(The G0MJW Valve Pages )
There are many valves about suitable for amateur use. What I am trying to get
together here is a set of data and possibly a few designs for the VHF/UHF bands.
A few recommendations from the experts as well if they will share their knowledge.
I have gathered some short form data for some popular devices. I am still putting
this information together so please Email me if you have any additions or corrections.
A great supplier is RF Parts. Most of
the valves listed are available in the UK, but at greatly inflated prices. The
internet helps in this regard. Eastern European valves are available from several
sources, e.g. Alex UR4LL.
2C39A - Only 100W but good to 13cms
3CX100 - Similar to 2C39A
3CX400 - 400W. Good to 1GHz but expensive, used
in old Henry Tempo amps
- 3-500Z - Well used at HF zero bias valve. Full ratings
to 110MHz but can be used to 2m.
3CX800 - 800W. Just manages 70cms, used in the Henry Tempo 2002A,2004A
3CX1200 - 1.2kW a big 3CX800 or a little 3CX1500. Useable on 2m. Tough
50W grid dissipation.
3CX1500/8877 -1.5kW on 2m? Expensive but good for the ego. Can work on
70cms at a struggle
GS35B - A Russian coaxial tube, with 1.6kW dissipation
and good to 1GHz (Cheap!). Excellent buy.
- Miniature Microwave Valve - Not all russian Triodes
- 4CX250B - Surely everyone has one. Usable to 500
MHz Abusable to 400W
4CX250R - Ruggedised version of the 4CX250B -
The one to buy new.
4CX250K - Coaxial base version of the 4CX250B
rated to 1.2GHz.
4CX350A - An upgraded linear 4CX250 capable of
400W to 144MHz
8938 - What is this doing here - It is essentially
a 4CX250R with a bigger anode rating.
4CX400A - Svetlana have released this. It is like
a 4CX250R but 400W dissipation.
- 4CX600J - Some 500 watts on 70cms! Only needs a small mortgage. Delicate,
odd base pin out.
4CX1000 - 1 kW dissipation. Hard to make work
at VHF but great if you can.
4CX1500 - 1.5 kW and much easier to use than the similar 4CX1000.
- 7213 - 1.5 kW through 23cms - More common DOD006
is similar and cheap - don't be put off by the ones with welded wire connections
as these are easy to remove.
YL1050 - A Siemens valve with 1600W dissipation up to 400 MHz
- GS-23B - Russian tetrode. 1600W dissipation to 1 GHz and cheap.
4CX3000A - 3kW on 2m ? This is getting silly. EME only.
4CX??? - I wonder what this is ?
Last Modified 26st August 2000