[ARC5] T-22 Woes

[D C _Mac_ Macdonald]

What is T54?  I have several T-22s in various states of disrepair that I have bought and could look.

 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* k2gkk at hotmail.com * 
* Oklahoma City, OK * 
* USAF & FAA (Ret.) * 
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> From: brianclarke01 at optusnet.com.au
> To: mark.k3msb at gmail.com; arc5 at ix.netcom.com
> Date: Fri, 14 Jun 2013 10:56:58 +1000
> CC: arc5 at mailman.qth.net
> Subject: Re: [ARC5] T-22 Woes
> 
> 
> 
> Hello Mark, 
> 
> Valuable lesson you've gained there. 
> 
> Another valuable lesson from a colleague of mine - wind on even more
> turn of insulated wire at the cold end of the PA tank coil and you can
> get a very close match to 50 Ohm. If you do find and fit the varaible
> transformer link, put these additional turns in series so you can
> still use the roller inductor for fine tuning / matching to your
> antenna and feedline. 
> 
> The beauty of this mod is that it is totally reversible and leaves no
> witnesses. 
> 
> 73 de Brian, VK2GCE. 
> 
> OnThu, 13 Jun 2013 08:37:35 -0400, Mark said:
> 
> I’m not going to have very much time for radios until maybe Friday
> night at
> the earliest, so while I was lying in bed last night I decided to get
> up
> early this morning to get in some radio time before work and see if
> T-54B
> was indeed the culprit.
> 
> I wound a few turns of hookup wire over the base of T54 to simulate a
> max
> coupled condition and was delighted to see about 15W of output on the
> wattmeter! Adjusting the roller inductor peaked the output to a little
> over 20W – that’s running about 350V or so on the plates through a
> 67 pF
> coupling capacitor then through the 4:1 UNUN.
> 
> WhooooHoooooo!! There be power there!!
> 
> This was a toughie for me, and was a great experience to really dive
> into
> the innards of the T-22. I’m going to keep my eyes peeled for a
> replacement transformer. A buddy in Texas recently decided to get out
> of
> the mil radio aspect of our hobby and sold me most of his stuff at a
> good
> buddy price, and there are a few bags of parts in those boxes. I know
> I
> saw a transformer in there, but I didn’t check to see if it was for
> a T-22.
> 
> Thanks for your help and comments guys – it’s great to have you
> guys on
> here to help out and offer suggestions!
> 
> 73
> 
> Mark K3MSB
> 
> Sent from my Android phone