Page 10 ----- TWT and Klystron RF Amplifiers

Dudley Lab
Return to Home Page for index and Contact info

--- December 5, 2018 ---


Index -- For Page 10
Will Jump Down This Page To Product
Manufacture Product, Type
Caution TWT .pdf
CW RF Amplifier Testing Set Up
Pulse RF Amplifier Testing Set Up
Dudley Lab Warranty
Dudley Lab Wave Tube RF Amplifiers (TWTA) #twt-dudley ** Dudley Lab TWTA's**
RF Tubes (TWT's) #tubes TWT'sHughes, Varian ( Tube Only )
LigiMetrics RF Amp. (TWTA) #amp-other LigiMetrics and Other TWTA Amps.
Varian 6900G Series RF Amplifiers (TWTA) #amp-varian 6900G Varian 6900G Series TWTA Amplifier
Varian CPI Series Lab RF Amplifiers (TWTA) #amp-varian Varian 6900 Series TWTA Amplifier (6951, 6961, 6962, 6902)
Hughes 77 Series Lab RF Amplifiers (TWTA) #amp-hughes77 77 Series Hughes TWTA Amplifier (1177, 1277)
Hughes 8000 Series Lab RF Amplifiers (TWTA) #amp-hughes8000 8000 Series HughesTWTA Amplifier (8010, 8020, 8100, 8001)
HP 490 Series Lab RF Amplifiers (TWTA) #amp-hp 490 Series Hewlet Packard TWTA Amplifier (491, 493)
Alfred and Servo Lab RF Amplifiers (TWTA) #amp-alfred-servo Alfred, Servo amd English Valve TWTA Amplifier
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TWT Amplifiers
RF Amplifier Testing Set Up
Caution TWT .pdf
Dudley Lab built TWT Amplifier The configuration shown below is typical for our small enclosure TWTA's 3U (17" x 5.5" x 20")
Shipping: 35 pounds 24" x 24" x 12"
Can Ship USPS Air Mail to most Countries.
Dudley Lab
TWT Amplifier
1 Year 100% Warranty --

Dudley Lab Rated Items
Amplifiers are built with all NEW parts.
QTY Model No. Description US$
1 Dudley Lab/ITT TWT Amplifier
9 to 14GHz 20 Watts
Dudley Lab
Dudley Lab/ITT TWT Amplifier SN-001
Dudley Lab built with all new parts (some NOS).
RF Connectors: N (f)
120 VAC, Rack Mount
Delivery from stock, can ship in 1 business day.
DL Tag 1378, 1379
Test Data - Plot-16 DL-ITT SN-001.pdf
Test Data - Small Signal DL-ITT SN-001.pdf
$7,500
NEW
1 Dudley Lab TWT Amplifier
10 Watts 5.0 to 8.5GHz

Dudley Lab
Delivery ARO ~ 3 weeks.
Dudley Lab/Varian TWT Amplifier SN-001
85 to 265VAC, Rack Mount,
Varian TWT Model VTJ-2685B2
Dudley Lab built with all new parts (some NOS).
-- With 1 Year 100% Warranty --
Link to Larger Photo
Link to 2nd Photo
Link to Inside Photo
Link to Test Data 1
Link to Test Data 2
Link to Test Data 3
Link to Test Data 4
$5,850
NEW
3 weeks ARO
0
Dudley Lab TWT Amplifier
10 Watts 4.0 to 10.0GHz
Delivery From Stock
Dudley Lab
Dudley Lab/NEC TWT Amplifier SN-NEC-001
NEC TWT Model: L4513
Dudley Lab built with all new parts (some NOS).
We have a large stock of new parts
to service this amplifier, if required.
Rack Mount
Prime Power: 100 to 240VAC,
-- With 1 Year 100% Warranty --
Link to Photo
Link to 2nd Photo
Link to 3rd Photo
$4,200
NEW
SOLD
Another unit
3 weeks ARO
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TUBES Only Varian, Litton, Hughes
2 Varian TWT VTL-5341A4
Dudley Lab
Varian TWT VTL-5341A4 L-Band Pulse
Varian Specification: Model VTL-5341A4 L-Band Pulse
freq. 1.09 to 1.36GHz
ef: 19 V
Egk: 190 V
Eb: 9.4 kVdc
Big Tube 31" Long, 3.25" Dia
Link to 2nd Photo
Link to Data 1
Link to Data 2
$2,100 ea.
NEW Part
1 Litton Model L3460
Magnetron ~ 600 Watts, ~ 2.5GHz
Dudley Lab
Litton Model L3460 Magnetron ~ 600 Watts, ~ 2.5GHz NEW
With Magnets
Waveguide output ~3" x ~1.5"
This is a serious tube Liquid Cooled.
Link to 2nd Photo
Link to 3rd Photo
I have the original shipping hardware and Barrel.
NEW Part
$2,100
NEW Part
3 Varian Model VA-888B
Klystron 1.4 kW 4.4 to 5.0GHz
Dudley Lab
Varian Klystron 1.4 kW 4.4 to 5.0GHz Tube is NEW
Varian Specification: Model No. VA-888B
Pout 1.4 kW 4.4 to 5.0GHz tuneable
Pin 50mW
Ef 6.5 V at 8.2A
Eb 7.5 kVDC
Cathode I 0.487A
With Magnets
Link to 2nd Photo
Link to 3rd Photo
Link to 4th Photo
Link to 5th Photo
Link to 6th Photo
Link to 7th Data
Many sellers are mistaken that they have a new tube when they get it in original packing. Most times this is because the installer put the old tube back in the original packing. The tip-off is the seller has no test data. All new Klystrons have final test data packed with the tube. We have the test data for this one. This tube is NEW. This Tube is packed in the original steel drum and will need to ship by truck.
$2,100 ea.
NEW Part
1 Dudley Lab New TWT Model KS22469L1 and Used Varian Power Supply
With WG to SMA Adaptors
Approx. 10 Watts 6 to 7GHz
DC Power Required -48 Volts
Link to Test Data
$400
NEW Tube
SOLD
1 Hughes TWT 838H Tube only
16 to 16.5Ghz 100 kW Pulse

Dudley Lab
Hughes TWT - RF Amplifier Tube 100kW Pulse
* Tube is NEW *
This is a very serious amplifier tube. It is liquid cooled.
Hughes Specification Model No. 838H
ef: 10.5V
Ec: -800V
ec: +610V
Ek: 61kVdc
Eb: -23.18kVdc
0.005 Pulse
With Modulation control.
With Vac Ion pump. PPM Magnets
I will guarantee this tube if the buyer is a qualified test/user lab.
As this item may have military applications it will only be sold within US.
Link to Photo 1
Link to Photo 2
Link to Photo 3
Link to Photo 4
Link to Photo 5
$2,000
Tube is NEW
1 Varian VTX6281H7 Tube only
7.9 to 8.4GHz 600 watts
Dudley Lab
Varian TWT (tube only)
Condition is Used/Tested and Guaranteed Good
Ef = 6.3 V
Eb = 6,400 VDC
Ec = 11,300 VDC
Ew = 11,300 VDC
Link to Photo
$2,000 ea.
TWT Only
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****** - MCL TWTA's and Klystron ******
> 10 MCL MX-9000 Klystron HPA's
12.75 to 13.25GHz 2,000 Watts
13.75 to 14.5GHz 2,000 Watts

Dudley Lab
Dudley Lab Rated Item

MCL MX-9000 HPA
We have service records for all units.
Avaliable Frequency Ranges:
12.75 - 13.25 GHz (Klystron Model VKU 2454A8)
13.75 - 14.50 GHz (Klystron Model VKU 2455B8)
Pin ~ -18dBm (Gain control from front panel)
Pout sat.: 2.0 kW (63.0 dBm) (normal opp. ~ 400 W -7dB)
These units are used and the ones we have tested output about 1200 Watts.
The price will depend on the RF power you need.
RF Connectors: Input: Type N (f) Output: WR-75
Input VSWR: 1.25:1 max.
Output VSWR: 1.20:1 max.
Prime Power: 3 Phase T3 Model 23D1904
voltage range WYE 420 to 560, 11.5 KVA max.
Currently wired for 480 3 phase
voltage range Delta 242 to 323, 11.5 KVA max.
If your prime power is different please let us know, we may be able to provide a transformer to convert to the 480, No cost to you.
Link to Three-phase electric_power Info.
Weight: 900 lbs. max.
These are very heavy duty Amplifiers designed for 24/7 operation.
Cooling: Forced air with integral blowers.
Front of ~100 page Operation Manual 1.pdf
Back of ~100 page Operation Manual 2.pdf
Link to Specifications pdf
Link to Larger Photo
Link to Photo 2
Link to Photo 3
Link to Three-phase electric_power Info
Accessories:
PDF Manual
Apollo Diplexer Link to Diplexer List
Apollo HP Dummy Loads Link to Dummy Load List
at wh
Great Price.
$5k to $18k Please call for details
Henry Dudley
732-240-6895
1 MCL 13049 Channel Changer
Dudley Lab
Dudley Lab Rated Items

MCL 13049 Channel Changer SN-1095, 1093
This kit is used to remotely change the Klystron channel.
Use with MCL MX-9000 or other Varian Klystron amplifiers.
Link to Larger Photo
$1,600 ea.
NEW
1 MCL Model 10529
75 Watts 5.9 to 6.7GHz

Dudley Lab
MCL SN-1010
N input and WR-137 output, Rack Mount
Varian TWT Model VTC-6161H4 Rated 5.9 - 6.4GHz 75W
~ 510 hours of run time, Very Clean Unit.
Prime Power: 120VAC 50/60 Hz
Link to Larger Photo
Link to Rear Photo
$4,800
On Hold
For Repair
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****** Dudley Lab LogiMetrics TWTA's
Caution TWT .pdf
Link to A600 General Specifications
Link to A710 Specification pdf
Manual for A230/240-330/340-350
CW RF Amplifier Testing Set Up
Pulse RF Amplifier Testing Set Up
******
1 A610/P LogiMetrics
250 Watts 500 to 1000MHz
Dudley Lab
Dudley Lab Rated Item

LogiMetrics TWT Amplifier, SN-6340
250 Watts 500 to 1000MHz, Helix Current is Very Low
208VAC 3 phase (L21-30P)
Link to Larger Photo 1
Link to Larger Photo 2
Link to Larger Photo 3
Link to Test Data pdf
Link to Three-phase electric_power Info
Link to Specifications Section of Manual PDF
Link to Operation Section A600 Series -- Manual PDF
With 4 foot Prime Power Cord
$19,200

L21-30P (Hubbel HBL2811) to AMPHENOL IND. 97-3106A-18-11S
Works with LogiMetrics Model A610P and some other LogiMetrics Amplifiers.
$400
1 A500/S LogiMetrics
100 Watts 2 to 4GHz
Dudley Lab
Dudley Lab Rated Item

LogiMetrics TWT Amplifier, SN-5062
2 to 4GHz, 100 Watts
This is the nicest, cleanest LogiMetrics Amplifier we have ever had.
I think it is NEW. The Curtis Hour Meter showes 0 hours and the unit is spotless inside. Operates Perfect.
Link to Larger Front Photo 0
Link to Front Photo 1
Link to Rear Photo 2
Link to Left Side Photo 3
Link to Right Photo 4
Link to Top Photo 5
Link to Photo Curtis Model 520 LNA Hour Meter
Link to RF Test Data jpg

$24,500
NEW?
SOLD
Dudley Lab 2 foot Power Cord with 6 foot Extension.
1 A600/C LogiMetrics
200 Watts 4 to 8GHz
Dudley Lab
LogiMetrics TWT Amplifier, SN-xxxx
4 to 8GHz, 200 Watts, Helix Current is Very Low (2mA max.)
208VAC 3 phase (L21-30P)
Link to Photo 1
Link to Photo 2
Link to Test Data jpg
Link to Three-phase electric_power Info
Link to Specifications Section of Manual PDF
Link to Operation Section A600 Series -- Manual PDF
With 4 foot Prime Power Cord
L21-30P (Hubbel HBL2811) to L21-30S (Hubbel HBL2813)
$18,800
SOLD
Workin on another one of these.
1 A600/S LogiMetrics
200 Watts 2 to 4GHz
Dudley Lab
LogiMetrics TWT Amplifier, SN-6442
2 to 4GHz, 200 Watts, Helix Current is Very Low
208VAC 3 phase (L21-30P)
Link to Larger Photo 1
Link to Larger Photo 2
Link to Larger Photo 3
Link to Test Data pdf
Link to Three-phase electric_power Info
Link to Specifications Section of Manual PDF
Link to Operation Section A600 Series -- Manual PDF
With 4 foot Prime Power Cord
$16,200
SOLD

4 foot Prime Power Cord
L21-30P (Hubbel HBL2811) to L21-30S (Hubbel HBL2813)
$400
1 A600/IJ-682 LogiMetrics
8 to 18GHz 200 Watts CW
Dudley Lab
LogiMetrics TWT Amplifier
8 to 18GHz, 200 Watts, CW
It is a very nice Amplifier, with little time on it.
Very low Helix I, Very clean inside and out.
As close to new as you will find.
RFin N, RFout RWD-750 Double Ridge
208VAC 3 phase
8GHz Pin= -8dBm for Pout 200W
13GHz Pin= -14.2dBm for Pout 200W
18GHz Pin= +6dBm Pout for 200W

AT WH xxx DL Tag 1499
$23k
SOLD*
1 A610-XU/418 LogiMetrics
11.25 to 12.50GHz 250 WattsDudley Lab
Dudley Lab Rated Item

LogiMetrics TWT Amplifier, SN-6104
A610-XU/418 LogiMetrics
11.25 to 12.50GHz 250 Watts CW
RFin SMA, RFout RWD-750 Double Ridge
208VAC 3 phase
Link to Larger Photo 2
Link to Larger Photo 3
Link to Test Data jpg
Link to Three-phase electric_power Info
Link to Specifications Section of Manual PDF
Link to Operation Section A600 Series -- Manual PDF
4 foot Prime Power Cord
L21-30P (Hubbel HBL2811) to L21-30S (Hubbel HBL2813)
$14,900
1 A710/Ku LogiMetrics
12 to 18GHz, 1,000 Watts, Pulse
Dudley Lab
LogiMetrics TWT Pulse Amplifier SN-7083
12 to 18GHz 1,000 Pulse RF
Connectors RFin N, RFout WR-62
120VAC 1 phase.
With 3 foot Prime Power Cord.
Link to Test Data jpg
$15,000
SOLD
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Dudley Lab Xicom Caution TWT .pdf
CW RF Amplifier Testing Set Up
2 Xicom XTRD-500S SN-5591A
2.026 to 2.526GHz, 500 Watts CW
Dudley Lab
Dudley Lab Rated Item

Xicom TWT Amplifier, SN-5591A
Model XTRD-500S -- 2.026 to 2.526GHz, 500 Watts CW
Very High Cost, long life Boeing TWT Model 5525H
RF Connectors N (f)
220VAC 1 phase @8A
Link to Photo 2
Link to Photo 3
Link to Photo 4
Link to Photo 5
Link to Test Data
Not the exact Manual, all I have -- 400W-XTRD-400K.pdf
With 4 foot Prime Power Cord.
$11,500 each
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****** Dudley Lab Varian TWTA's Caution TWT .pdf
CW RF Amplifier Testing Set Up
******
1 VZC-6965F4 400 Watt Varian TWTA
5.85 to 6.425GHz
Dudley Lab Rated Item

Varian VZC-6965F4 SN-3529
5.85 to 6.425GHz 400 Watt Amplifier
220VAC Single Phase
Link to Photo 2 RF Section
Link to Photo 3 Power Supply Inside
Link to Photo 4 RF Unit Inside
Link to Photo 5 Rear Cabling
Link to Test Data jpg
This is one of the nicest units of this type we have seen.
Very clean. Easily provides the specified 400 watts.
Link to 120-230 prime power wireing PDF
With 4 foot Interconnect Cable Set.
$11,300
Cable set, 4 feet long,
Sorry about the price. The HV connectors amd wire is very high cost.
$1,200
3 VZC-6965F4 300 Watt Varian TWTA
5.85 to 6.425GHz RF Unit Only

file photo
Dudley Lab Rated ItemVarian VZC-6965F4

5.85 to 6.425GHz RF Unit Only
Link to file Photo 2
Link to file Photo 3
Link to file Photo 4
Link to Test Data SN-3683jpg
Link to Test Data SN-3682jpg Extended Frequency Range
Link to Test Data SN-3228jpg
These are 400 watt units that are a little low on power.
$800 ea.
1 VZU6995F6 Varian
600 Watts 14 to 14.5GHz


Dudley Lab Rated Item

Varian TWT Amplifier, SN-GE687G0
RF Connectors: Input N, Output WR-75
Power supply has 8199 Hours (8640 = 1 year)
TWT Type: VTU6396C1 Rated 600W (9734)
Low Helix I ~ 3.9mA at full power (600W)
with HV and Controll Cable Set and Operation Manual (CD)
Prime Power: 120VAC 50/60 Hz < 20A
Unit has been tested and is working properly, data on request.
Link to Larger Photo 1 Power Supply
Link to Larger Photo 2 RF Unit
Link to 120-230 prime power wireing PDF
With 4 foot Interconnect Cable Set.
$11,300
SOLD
Cable set, 4 feet long,
Sorry about the price. The HV connectors amd wire is very high cost.
$1,200
1 VZX-6965D Varian
400 Watts 7.9 to 8.4GHz

Dudley Lab
Varian TWT Amplifier, SN-xxx
RF Connectors: Input N, Output WR-112
Power supply has xxxx Hours (8640 = 1 year)
TWT Type: VTX-6281H7 Rated 400W
Very Clean Unit, Very low Helix I
with HV and Controll cable set and Operation Manual (CD)
Unit has been tested and is working properly, data on request.
Prime Power: 120VAC 50/60 Hz
Link to Larger Photo 1
Link to 120-230 prime power wireing PDF
Link to Test Data PDF
$11,300
Missing !!
1 VTO6962D720B00 Varian
5.85 to 6.42GHz 100 Watts

Dudley Lab
Dudley Lab Rated Item

Varian TWT Amplifier, SN-...505
RF Connectors: Input N, Output WR-137
8698 Hours (8640 = 1 year), mfg. 4-13-94
TWT Type: VTC-6260E4 Rated 125W (xx94)
Very Clean Late Model Unit, Very low Helix I
Options: Power Meter, SSPA Pre Amp.
Prime Power: 120VAC 50/60 Hz
Link to Larger Photo 1
$2,400
1 VTC6962D7 Varian
5.85 to 6.42GHz 100 Watts
Varian TWT Amplifier, SN-560
RF Connectors: Input N, Output WR-137
2150 Hours (8640 = 1 year) DL Tag 1148
TWT Type: VTC-6260E4 Rated 125W (8913)
Very Clean Late Model Unit, Very low Helix I
Options: Power Meter, SSPA Pre Amp.
Prime Power: 120VAC 50/60 Hz
$4,400
1 VZA-6902 Varian
120 Watt 27 to 31 GHz
Varian TWT Amplifier, used only 10 hrs. for lab testing. Two pc. design rack mount power supply and RF unit.
For repair/service we have used TWT's for this amplifier.
-- Like New --- New Cost $80,000
Link to RF unit Photo
Link to Power Supply unit Photo 32k
$32,000
on hold for repair
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- Dudley Lab Varian Varian 6900G Series Specification pdf
CW RF Amplifier Testing Set Up
Caution TWT .pdf
-
1 Varian VZL6943G5M 1 to 2GHz 200 Watts CW
Dudley Lab
Dudley Lab Rated Item
Exceptional Amplifier - Low Run Time, Very Clean.

Varian VZL6943G5M SN-952
1 to 2GHz 200 Watts CW
Very Nice Amplifier, Very Low Run Time.
Runs Perfect.
Prime Power: 120VAC @ 19A
Photo Front
Photo Rear
Test Data
$31,500
NICE
1 Varian VZS6953G5M 2 to 4GHz 200 Watts CW
Dudley Lab
Dudley Lab Rated Item
Exceptional Amplifier - Low Run Time, Very Clean.

Varian VZS6953G5M SN-951
2 to 4GHz 200 Watts CW
Very Nice Amplifier, Very Low Run Time.
Runs Perfect.
Prime Power: 120VAC @ 19A
Photo Front
Photo Rear
Photo Inside
Test Data
$31,500
1 Varian VZC6963G5M 4 to 8GHz 200 Watts CW
Dudley Lab
Dudley Lab Rated Item
Exceptional Amplifier - Low Run Time, Very Clean.

Varian VZC6963G5M SN-950
4 to 8GHz 200 Watts CW
Very Nice Amplifier, Very Low Run Time.
Runs Perfect.
Prime Power: 120VAC @ 20A
Photo Front
Photo Inside
Test Data
$31,500
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Dudley Lab Varian
Bench Type Lab Amplifiers
Caution TWT .pdf
CW RF Amplifier Testing Set Up
******
Dudley Lab
Late Model Type File Photo

Dudley Lab
Early Model Type File Photo
Caution TWT .pdf
Link to 6900 Series Specifications
Link to 6900G Series Specifications
Link to 6981 Manual, Operation Section
Link to CPI-Varian-TWTA-6900K4.pdf
RF Amplifier Testing Set Up

Dudley Lab RF Amplifier Repair Service
******
1 VZL6941K7D Varian
20 Watts 1.0 to 2.0GHz
Late Model Type File Photo Above
Varian TWT Amplifier, SN-7047
Front N Connectors, Rack Mount
Very Good Condition, Late Production Unit
With Output Isolator
With HPIB Interface
With -30dB Sample Port (N)
Prime Power: 120VAC 50/60 Hz
$4,800
1 VZL6941K1 Varian
20 Watts 1.0 to 2.0GHz
Varian TWT Amplifier, SN-6124
Rear N Connectors, Rack Mount
We will move connectors to front, no charge.
Very Good Condition
Test Data
Prime Power: 120VAC 50/60 Hz
$4,200
1 VZS6950K1 Varian
10 Watts 2.0 to 4.0GHz
Varian TWT Amplifier, SN-6271
Rear RF N Connectors, Rack Mount
With RF Output Isolator
Good Condition
Prime Power: 120VAC 50/60 Hz
$3,700
1 VZS6951 Varian
20 Watts 2.0 to 4.0GHz
Varian TWT Amplifier, SN-6126
Rear N Connectors, Rack Mount
We will move connectors to front, no charge.
Test Data
Very Good Condition
Prime Power: 120VAC 50/60 Hz
$4,200
1 VZS6951K1 Varian
20 Watts 2.0 to 4.0GHz
Varian TWT Amplifier, SN-6522
Rear N Connectors, Rack Mount
Good Condition, Inside and out
Prime Power: 120VAC 50/60 Hz
$4,200
1 VZS6951K1 Varian
20 Watts 2.0 to 4.0GHz
Late Model Type File Photo Above
Varian TWT Amplifier, SN-xxxx
Front N Connectors, Rack Mount
Very Good Condition, Late Production Unit
With Output Isolator
With HPIB Interface
With -30dB Sample Port (N)
Prime Power: 120VAC 50/60 Hz
$4,900
1 VZH6970 Varian
10 Watts 4.0 to 8.0GHz
Varian TWT Amplifier, SN-5600
Front N Connectors, Rack Mount
Good Condition
Prime Power: 120VAC 50/60 Hz
$3,900
1 VZH6970K1 Varian
10 Watts 4.0 to 10.0GHz
Varian TWT Amplifier, SN-5593
Front N Connectors, Rack Mount
Good Condition
Prime Power: 120VAC 50/60 Hz
$3,600
1 VZX6981 Varian
20 Watts 8 to 12.4GHz Rated
20 Watts 5 to 16GHz Operational
Varian TWT Amplifier, SN-6256
Rear N Connectors, Rack Mount
We will move connectors to front, no charge.
Very Good Condition
Test Data 8 to 12.4GHz
Test Data 5 to 16GHz
Prime Power: 120VAC 50/60 Hz
$4,900
1 VZM6991 Varian/CPI
6 to 18GHz 20 Watts min.
6.2 to 11.7GHz 50 Watt
9.8GHz 73 Watts
Dudley Lab Rated Item

CPI/Varian
TWT Amplifier, SN-5789
VZM6991 Varian/CPI
Exceptional Amplifier 6.2 to 11.7GHz - 50 Watts, 73 Watts at 9.8GHz.
Front SMA RF Connectors, Rack Mount.
Very Good Condition.
Prime Power: 120VAC 50/60 Hz
Please review the the test data below.
Test Data 1 6 to 15GHz plot
Test Data 2 6 to 15GHz tabular
Test Data 3 6 to 15GHz tabular
Typical Data to 18GHz will be provided with Amplifier, 24 watts min.
$7,900
SOLD*
1 Exceptional Amplifier

VZM6991K4 Varian/CPI
4 to 18.5GHz >20 Watts
xxxWatts
Dudley Lab
Photo Inside/Rear
Dudley Lab Rated Item

CPI/Varian TWT Amplifier, SN-112597E0
VZM6991K4 Varian/CPI
TWT: VTM6196R5B (Rated 25 watts)
Rear N (f) Connectors
5 STAR Condition. Very Low Run Time.
Options: E Rack Mount,
RF IN/OUT Isolators,
RF Sample Port,
Gain Control.

Prime Power: 120VAC 50/60 Hz
Please review the the test data below.
Test Data plot 1
Test Data tabular page 1
Test Data tabular page 2

For this Amplifier please see item 8 on the Caution sheet.
Caution TWT .pdf
$8,500
1 Exceptional Amplifier Believed to be NEW

VZM6991 Varian/CPI
6.5 to 18GHz 20 Watts
6.5 to 15GHz 50 Watts
Dudley Lab
Photo Inside
Photo Back
Dudley Lab Rated Item

CPI/Varian TWT Amplifier, SN-DL-123
VZM6991 CPI/Varian
6.5 to 18GHz 20 Watts min.
76 Watts at 8.1GHz. Please see test data below.
TWT: VTM6195R1 (Rated 25 watts)
Front N (f) Connectors
Very Good Condition.
Options: E Rack Mount, K SS pre amp for Higher Gain
Prime Power: 120VAC 50/60 Hz
Please review the the test data below.
Photo Inside
Photo Back
Test Data plot 1
Test Data tabular set 1 page 1
Test Data tabular set 1 page 2
Test Data plot 2
Test Data tabular set 2 page 1
Test Data tabular set 2 page 2
Test Data plot 3
Test Data tabular set 3 page 1
Test Data tabular set 3 page 2
Caution TWT .pdf
$9,500
Believed to be NEW.
SOLD* MB
1 VZM6991 Varian/CPI
6.5 to 18GHz 20 Watts
6.5 to 15GHz 50 Watts
Dudley Lab
Dudley Lab Rated Item
CPI/Varian TWT Amplifier, SN-1246
VZM6991 Varian/CPI 6.5 to 15GHz - 50 Watts, 74 Watts mid band.
Unit has Select TWT: VTM6195B1 (55W) Tag
Front N Connectors, Rack Mount.
Very Good Condition.
Prime Power: 120VAC 50/60 Hz
Please review the the test data below.
Photo Inside
Photo Back
Test Data 1
Test Data 2
Test Data 3
Test Data 4
Test Data 5
Caution TWT .pdf
$7,900
SOLD
1 VZM6990K1 Varian/CPI
8 to 18GHz 10 Watts
Varian TWT Amplifier, SN-5506
Very Good TWT: VTM6096R1
Rear SMA Connectors, Rack Mount
We will move RF connector to front at no charge.
Very Good Condition
Prime Power: 120VAC 50/60 Hz
$4500
1 VZM6991 Varian/CPI
8 to 18GHz 20 Watts
Varian/CPI TWT Amplifier, SN-SK1167G2
Nice Amplifier with a late model TWT.
Very Good Condition TWT: VTM6195R1 (rated 25W)
Rear N Connectors. We will move to Front no charge.
Rack Mount
With Output Isolator
Very Good Overall Condition
Prime Power: 120VAC 50/60 Hz
$5,900
SOLD*
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Dudley Lab
Hughes 77 series TWTA's
Dudley Lab Rated Items
Some of these are better than 3 Star. However, because of there age I must rate them as 3's. Contact me for details on particular unit.
CW RF Amplifier Testing Set Up
Caution TWT .pdf

Dudley Lab RF Amplifier Repair Service

****** Dudley Lab
file photo
1177/1277 Series TWTA's
Link to 77 Series Specifications/Options and Photo
Link to 77 Series Operation Manual PDF
All with Warranty --
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2 1177H09F000 Hughes
1 to 2GHz 10 Watt
Hughes TWT Amp, SN-129, 019
1 to 2GHz 10 Watt
SN-019 RF N type, TWT 417HD (72-38) DL Tag: 1419
SN-129 RF N type, TWT 417HD
Prime Power: 120VAC 50/60 Hz
$2,400 ea.
1 1177H01F000 Hughes
2 to 4GHz, 10 Watts
Hughes TWT Amplifier SN-055
TWT Type: 564H
Prime Power: 120VAC 50/60 Hz
$2,450
1 1277H10F000 Hughes
1.4 to 2.4GHz, 20 Watts
Hughes TWT Amplifier, SN-130
TWT Type: 419H (8206)
DL Tag 1395
RF in/out N Connectors
Prime Power: 120VAC 50/60 Hz
$2,950
1 1288H Hughes
3.7 to 4.2GHz, 5 Watts
Hughes TWT Amplifier, SN-001
This amplifier was a special build with TWT model 235A
Low Helix I
RF in/out N Connectors
Prime Power: 120VAC 50/60 Hz
Link to Test Data
$1,500
1 1177H02F000 Hughes
4 to 8GHz, 10 Watts (20W)
Hughes TWT Amplifier SN-184
Front RF in/out N Connector
RF output is 20 watts with very low helix current. The TWT is correct for a 10 watt amplifier.
Prime Power: 120VAC 50/60 Hz
-- With Warranty --
$2,550
3 1177H02F000 Hughes
4 to 8GHz, 10 Watts
Hughes TWT Amplifier
RF in/out N Connector
SN-226 Low Helix I, TWT 648H (80-10), DL Tag:1377
SN-025 Low Helix I, TWT 648H (83-26)
SN-088 Low Helix I, TWT 648H (81-23), DL Tag:1428
Prime Power: 120VAC 50/60 Hz
-- With Warranty --
$2,450 ea.
1 1177H02F000 Hughes
3.5 to 8GHz, 10 Watts
Hughes TWT Amplifier SN-025
RF in/out N Connector
DL Tag:1304
Prime Power: 120VAC 50/60 Hz
-- With Warranty --
$2,450
5 1177H04F000 Hughes
12.4 to 18GHz, 10 Watts
Hughes TWT Amplifier SN-many, see list
SN-056 RF in/out SMA (operational 8 to 18GHz)
SN-111 RF Connectors N (f), DL Tag:1228 TWT: 848 -- SOLD --
SN-111 has a dip at 17.65GHz to 7 watts
SN-377 RF Connectors WR-62
SN-132 RF Connectors RFin SMA, RFout WR-62
Prime Power: 120VAC 50/60 Hz
$2,450 ea.
1 1177H15F000 Hughes
8 to 18GHz, 10 Watts
Hughes TWT Amplifier SN-083
TWT is Model 846H
dip to 7W at 16.65GHz
RF in/out N Connector
Prime Power: 120VAC 50/60 Hz
$2,450
2 1077H11F000 Hughes
18 to 26.5GHz, 1 Watt
Hughes TWT Amplifier, SN-030, 099
RF in/out WR-42 Connectors
SN-030 TWT is Model 911H (8616), DL Tag 1480
Prime Power: 120VAC 50/60 Hz
$2,900
1077H11F000 Hughes
18 to 26.5GHz, > 1 Watt
Dudley Lab

Dudley Lab Rated Items
Exceptional Amplifier
Came to me as factory original, not worked on.
Worked perfect, needed nothing.
Hughes TWT Amplifier, SN-008
RF in/out WR-42 Connectors
Prime Power: 120VAC 50/60 Hz
Photo Inside
Photo Back
Test Data plot set 1 page 1
Test Data tabular set 1 page 2
Test Data tabular set 1 page 3
Test Data plot set 2 page 1
Test Data tabular set 2 page 2
Test Data tabular set 2 page 3
$3,200
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Dudley Lab Hughes 8000 series TWTA's Dudley Lab Rated Items
CW RF Amplifier Testing Set Up
Caution TWT .pdf
Some of these are better than 3 Star. However, because of there age I must rate them as 3's. Contact me for details on particular unit.
****** Dudley Lab
file photo
Caution TWT .pdf
8000 Series Operation Manual
8000 Series Spec./Options/120 to 220VAC Convert
8000 Series Amplifier - pcb Schematic
8000 Series Amplifier - Tubes
-- All With Warranty -- Dudley Lab Warranty
RF Amplifier Testing Set Up
WR-28 RF Amplifier Testing Set Up

Dudley Lab RF Amplifier Repair Service

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1 8020H09F000 Hughes
1 to 2GHz 20 Watts
Hughes TWT Amplifier, SN-177
Unit is Clean Inside and Out.
Very Low Helix I.
N Connectors Front
Prime Power: 120VAC 50/60 Hz
$4,800
1 8020H09R000 Hughes
1 to 2GHz 20 Watts
Hughes TWT Amplifier, SN-193
Unit is Clean Inside and Out.
With RF Output Isolator
Very Low Helix I.
N Connectors Rear
Prime Power: 120VAC 50/60 Hz
$4,800
2 8010H09F000 Hughes
1 to 2GHz 10 Watts
Hughes TWT Amplifier, SN-138,123
SN-138 RF: Front N in/out, DL Tag 1144
Unit is Clean, Very Low Helix I, Has Option J output isolator

SN-123 RF: Front N in/out, DL Tag 1410
Unit is Clean, Low Helix I, Has Option J output isolator
both, Prime Power: 120VAC 50/60 Hz
$3,100 ea.
1 8010H10F000 Hughes
1 to 2.4GHz 10 Watts
Hughes TWT Amplifier, SN-151
RF: Front N in/out
Prime Power: 120VAC 50/60 Hz
$2,900
1 8010H01R000 Hughes
2 to 4GHz 10 Watts
Hughes TWT Amplifer., SN-149
With Output Isolator, and Remote Control
Rear N connectors
Prime Power: 120VAC 60 Hz
$2,700
5 8020H01x000 Hughes
2 to 4GHz 20 Watts
Hughes TWTA SN-200, 209, 111, 282, 285
SN-200, 209 is Front N connectors, no options.
SN-111 is Rear N connectors
SN-282 has options E, F, J, R
SN-285 has options E, J SOLD
Prime Power: 120VAC 60 Hz
$4,800
1 8020H01R000 Hughes
2 to 4GHz 20 Watts
Hughes TWT Amplifer., SN-379
NEW Varian Tube
Prime Power: 120VAC 60 Hz
Late model chassis and power supply. NEW Tube, Very Nice.
$3,900
1 8010H19F000 Hughes
2 to 8GHz 10 Watts
Hughes TWT Amplifier, SN-107
RF: Front N in/out
Has Option P (488 HPIB Interface)
Good Condition
Prime Power: 120VAC 50/60 Hz
$3,200
1 8010H13F000 Hughes
3 to 8GHz 10 Watts
Hughes TWT Amplifier, SN-110
Good Condition
Prime Power: 120VAC 50/60 Hz
$3,000
1 8010H02F000 Hughes
4 to 8GHz 10 Watts
Hughes TWT Amplifier, SN-218
Good Condition
Prime Power: 120VAC 50/60 Hz
$3,000
1 8010H06F-000 Hughes
4.0 - 10.5Ghz 10 watts
Hughes TWT Amplifier, SN-101
Good Condition
N connectors
Prime Power: 120VAC 50/60 Hz
$3,800
3 8010H03F000 Hughes
8 to 12.4GHz 10 Watts
Hughes TWT Amplifier, SN-203. 131, 141
SN-203. 131 RF: Front SMA in/out
SN-141 Rear N Connector
Prime Power: 120VAC 50/60 Hz
SN-131 DL Tag. 1149
$3,800
1 8020H03R058 Hughes
8 to 12.4GHz 20 Watts
Hughes TWT Amplifier, SN-203
Varian TWTA 8 to 12.4GHz 20 Watts
RF: Rear N in/out
We will change to Front for no charge.
Very Low Helix I
Prime Power: 120VAC 50/60 Hz
$4,800
2 8010H04F-000 Hughes
12.4 - 18.0GHz 10 watts
Hughes TWT Amplifier, SN-152, 169
SN-152 With Output Isolator Opt. J, Front RF input/output SMA (f)
SN-169 With Output Isolator Opt. J, Rear RF input/output N (f)
Prime Power: 120VAC 50/60 Hz
$3,800
1 8010H04F-000 Hughes
12.4 - 18.0GHz 10 watts
Hughes TWT Amplifier, SN-138
Front RF input/output: SMA (f)
Prime Power: 120VAC 50/60 Hz
$3,800
1 8010H15F000 Hughes
8 to 18GHz 10 watts
Hughes TWT Amplifier, SN-107
Front RF input/output: SMA (f)
Prime Power: 120VAC 50/60 Hz
$3,800
1 8001H11F000 Hughes
18.0 to 21.5GHz 0.5 watt
21.5 ro 26.5GHz 1 watt
Hughes TWT Amplifier, SN-196
WR-42 input/output
DL Tag 1306
This Amplifier is low on power between 18.0 to 21.5GHz.
I would not normally offer this unit, low on power, except that it is very nice, smooth running with very low helix I
Prime Power: 120VAC 50/60 Hz
$2,400
1 8001H11F000 Hughes
18.0 to 24GHz 1 watt

Dudley Lab
file photo
Hughes TWT Amplifier SN-xxx
WR-42 input/output
Option J Output Isolator
Prime Power: 120VAC 50/60 Hz
$2,400
1 8001H11F000 Hughes
18 to 24GHz ~ 3 watt
Hughes TWT Amplifier SN-184
This was a special build, 3 Watts for most of the band.
WR-42 input/output
With OPT: J Output Isolator
Very low Helix I < 1mA.
Prime Power: 120VAC 50/60 Hz
Link to Test Data
$3,800
1 8001H12F000 Hughes
26.5 to 40GHz 1 watt
Dudley Lab
Hughes TWT Amplifier SN-257
WR-28 input/output
With OPT: J Output Isolator
Very low Helix I < 1mA
Prime Power: 120VAC 50/60 Hz
Link to Photo
$4,900
1 8010H18R Hughes
26.5 to 32GHz 10 watt
> 7 watts to 40GHz
Dudley Lab
Hughes TWT Amplifier SN-107R
Factory Specification 27.5 to 30GHz 10 Watts
See our test data sheet at: Link to Test Data
Rear RF input/output: WR-28
TWT Type: 992HA SN-A-4760R
Options A, E, J, P
Prime Power: 220VAC 50/60 Hz
Link to Photo 2
Link to photo 3
Link to photo 4
$8,500
SOLD out
for now
- - Hughes 8100 -
1 8100H02F000 Hughes
4 to 8GHz 100 watt
Hughes TWT Amplifier SN-107
RF input/output: N (f)
TWT Type:677HB (8831), DL Tag: 1401
Prime Power: 120VAC 50/60 Hz
This unit is very clean with Very low Helix I
-- With Warranty --
$12,500
Out for Repair
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****** Sold out for now. Hughes 1609H Series TWTA's ******
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1 Dudley LabHewlett Packard Dudley Lab Rated Items
Caution TWT .pdf
******
Dudley Lab
Hewlett/Packard
The HP 490 series TWT Amplifiers were built in the 60's and 70's and covered the RF Bands:
2.0 to 4.0GHz 1 Watt
4.0 to 8.0GHz 1 Watt
7.0 to 12.4GHz 1 Watt
These Amplifiers though somewhat dated were build very heavy duty and many have survived in good condition.
Link to HP-490 Series Photo
Link to HP-490 Series Manual -- Caution Large File

Caution TWT .pdf
CW RF Amplifier Testing Set Up
Dudley Lab Warranty
******
1 HP 493A
4 to 8GHz 1 Watt
Hewlett-PackardTWT Amplifier, SN-...678
With Modulation Option BNC connector
TWT Type: MEC M4278-C
N connectors, 120VAC
Very Clean Unit Inside and Out, With Manual pdf
$495.00
1 HP 491C
2 to 4GHz 1 Watt
Hewlett-PackardTWT Amplifier, SN-...332
With Modulation Option BNC Connector.
Watkin-Johnson TWT
N connectors, 120VAC
With Manual pdf
$495.00
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****** Alfred
Servo
English Valve
TWTA's
Dudley Lab Rated Items
CW RF Amplifier Testing Set Up
Caution TWT .pdf
******
1 English Valve TWTA Type N4183
7 to 18GHz 1 Watt SN-308215

English Valve TWTA Type N4183
7 to 18GHz 1 Watt
RF Connectors: SMS (f)
Link to RF Test Data
Prime Power: 220VAC Only
Old Amplifier. However, it operates very nicely.
Smooth transfer curve.
If you only need 1 watt 7 to 18GHz this is a good choice.
$450
1 560A Alfred
1 to 2GHz 1 Watt
operates 1 to 2.3GHz
Alfred TWTA AmplifierSN-435
Rack Mount Unit
RF Connectors: N
Prime Power: 120VAC
Link to Photo
$650
1 563A Alfred
7 to 12.4GHz 1 Watt
Alfred TWTA SN-1258
TWT Amplifier, Rack Mount Unit
RF Connectors: N
Prime Power: 120VAC
Link to Photo
$650
1 5-6868 Alfred
2.0 to 4.5GHz ~ 6 Watts
Alfred TWTA SN-177
Rack Mount Unit
RF Connectors: N
Prime Power: 120VAC
Link to Photo
$1,200
1 2220 Servo
2 to 4GHz 10 Watts
Servo TWT Amplifier SN-1132
Litton TWT,
RF Connectors: N
Prime Power: 120VAC
Link to Photo
$1,400
1 2250 Servo
8 to 12.4GHz 10 Watts
Servo TWT Amplifier
TWT Amplifier, Rack Mount Unit
RF Connectors: N
Prime Power: 120VAC
Link to Photo
$1,400
- Thanks for looking
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