CV315/4304CB/VT62 - RAF Transmitter

[nic]

A nice find ! Make sure you find the grid and anode dissipator caps before doing anything ! I've done an amp with 834 which is the same as 4304 but has a large chunk of graphite as an anode . This ran in zero bias (grid at 0V) . Running at 65mA with James 6123HS on the 5k tap driven by a choke-loaded cathode follower driver , a good few watts is achievable . In this configuration a low impedence driver with plenty of current on tap is required . Never used these in A2 but would expect damping factor may be an issue as inevitably your Rload will be lower than your Ra . If you are lucky enough to afford them , Dave Slagle can provide a 15K SE OPTX with offset cancellation winding . Then you can run these in A1

cheers

Nic

[Cressy Snr]

Cheers Nic

Is that a 6080 you've got running as a cathode follower there?
That's what I was thinking of doing myself.

Steve

[nic]

The cathode follower is a 7236

cheers

Nic

[nic]

Opps , not a 7236 , a 6BX7 is in the picture although I did use 7236 later on

cheers

Nic

[bonzo75]

Hi, I am interested in this tube. Does anyone have a pair for sale?

What tube are you guys using to drive an amp with the 4304

[Max N]

Anyone else having trouble seeing some of the pics in this thread? For instance the pics in Steve's 1st & 3rd posts?
The rest of the forum all seems ok...
Maybe I need to flush a cache or something....

[Max N]

If I right click and 'open image in new tab' I get
Http/1.1 Service Unavailable

[Ant]

They were probably hosted on an ancient mac. Com server that is no longer there

[Max N]

Interesting thread, plus I think my Dad would have worked with these during his national service, so a bit of nostalgia value

[Max N]

They were probably hosted on an ancient mac. Com server that is no longer there

OK, thanks Ant

[pre65]

I've got 4 of VT104 10E/215 (PT15) New Old Stock valves in war department boxes.

PT15 push pull anyone ?