SPEC's ON A TRIODE 7C29 TRANSMITTING TUBE

[W2PFY]

There is a book out that has some of the specfications but I can not find it around here. It is called "Tube Lore, Sibley, USA 1996" Maybe one of you have a copy of it. I would like information on the above 7C29 tube.

Thanks Terry   

[KE6DF]

It sounded like an interesting book so I ordered a copy from ebay.

If no one has responded by the time it comes, I'll post the specs.

Dave

[KB3DKS]

Terry and all,

For tube info first hand from the people who really know you should check out,
http://www.tubecollectors.org/

Mr. Ludwell Sibley, the books author is part of this as are some former Eimac and other tube Mfg. fngineers.

They have a very informative e-mail group.

Bill, KB3DKS in 1 Land

[WZ1M]

7C29:

[W2PFY]

(7C29:)

Yes 

[Opcom]

I dunno, searching for it keeps referring me to a tube porn site in Poland.
"Porn Download 7c29"
"naked straight guy 7C29 Projects For The Amateur ... tube porn site"

I did not investigate.

I found it is likely an GE or RCA triode. Possibly also called GL-7C29

[KE6DF]

Here is picture of the tube a (very) brief specs.

http://www.radiomuseum.org/tubes/tube_7c29.html

[KB3DKS]

Here is picture of the tube a (very) brief specs.

http://www.radiomuseum.org/tubes/tube_7c29.html

  If this isn't the correct tube I also have a GE listing for 7C29 that calls it a Gas/Mercury Thyratron replaced by # 714/7021. Measurements of 6.125 X 2.063 inches. This data from a 1979 GE Industrial Tube Products Guide.

Bill,
KB3DKS in 1 Land
 

[W3RSW]

Terry, do you actually have one?  If so, looks like it's a pretty hefty beast of 500 watt plate dissapation.  Get a 10v fil. xformer, rated same as for a pair of 833's for starters, and fire it up. A smaller primary adding/bucking xformer can get you the extra 0.5 volts if required.  Thoriated tugsten fil. means fast warm=up and probably can take voltages similar to a 4-400A.  I'd fire it up for fun in grounded grid without any further specs. unless you want to save it for posterity, a serious collector or bona-fide museum.  The AWA will take it, I'm pretty sure.

[W2PFY]

I done a lot of research on the 7C29 and the best information I can come up with is that it has a 10 volt filament @ 28 amps. It is a very close cousin of the GL 434A. There is absolutely no information on the GL-434A. I have several GL-434A tubes and they are hefty little external anode tubes that look like they could handle a KW with ease. The GL-434A was covered on here about a month ago so I'm familiar with those posts. So I'm still looking for anything new on the 7C29 or the GL 434A.

Thanks for your help so far guys 

[Jim, W5JO]

There isn't a lot of information.  Xmtg. triode, T-T filament 10.5 V @ 28 A, mu of 29, 500 watts, 110 Mhz, forced-air-cooled (GE) (9-5-46)

[ka3zlr]

Boy that Wick on that thing draws some juice.. 28 Amp...wholly smokes..

[Jim, W5JO]

There is absolutely no information on the GL-434A.

Best I can do here is:  GL 434A, AKA ZP 434; xmtg, UHF triode, In BC-667

No information on the ZP 434