[Milsurplus] OK Smart People - Mystery 211s

[C.Whitaker]

Check the pin contacts in both Osc and PA positions.
73  Clete
  WB2CPN
++++++++++++++++++++++++++++++++++++

On 6/15/2012 8:16 AM, David Stinson wrote:
> Just finished testing my stash of 211 transmit tubes
> by putting them in the BC-375.
> More than half were bad- mostly gassy.  sniff....
>
> Anyways, here's a mystery:  A few would not
> draw much current or put out much power in the
> PA stage, but they seem to work just fine
> in the Oscillator stage.  If this was low emission,
> I'd think they'd fail in either stage.  As a result,
> I've got four tubes marked "OSC ONLY."
>
> What's up with this?
>
> 73 Dave AB5S
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>