[ARC5] AM modulating an "ARC-5" transmitter...

[tbs50a at aol.com]

I'm no rocket scientist but wouldn't you use PNP transistor to control the positive voltage from the cathodes of the 1625's? And use a negative voltage to control the base of the transistor. 
Nube with xsistors!

Terry N3GTE

 

 

 

-----Original Message-----
From: D C _Mac_ Macdonald <k2gkk at hotmail.com>
To: tbs50a <tbs50a at aol.com>; ARC-5 Mail List <arc5 at mailman.qth.net>; WB6KBL Knoppow, Richard <1oldlens1 at ix.netcom.com>
Sent: Sun, Oct 11, 2015 2:08 pm
Subject: RE: [ARC5] AM modulating an "ARC-5" transmitter...



Very interesting.  Article written by Burt Yellin, K2STV.  My Summer 2015 Callbook shows K2STV as Burton Yellin. 
 
Maybe he would have some idea as to the suitable NPN transistors! 
 
Or maybe this is the original K2STV's son but call is NOT shown as a vanity call. 
 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* k2gkk hotmail com * 
* Oklahoma City, OK * 
* USAF & FAA (Ret.) * 
* * * * * * * * * * * 
 


 

> Date: Sun, 11 Oct 2015 13:18:12 -0400
> To: 1oldlens1 at ix.netcom.com; arc5 at mailman.qth.net
> Subject: Re: [ARC5] AM modulating an "ARC-5" transmitter...
> From: arc5 at mailman.qth.net
> 
> So would anyone hazard a guess at what would be good choices for the four xsistors??
> https://archive.org/details/73-magazine-1962-04
> 
> Terry N3GTE