[ARC5] Army/Navy transmitters from a NON COLLECTOR viewpoint, the ham version...

[J Mcvey]

 The FT226 rack will not work with the ARC-5 series (T-XX).Get a BC-XXX series to plug into it. it will also accommodate the ARA/ATA units as well.
They were all screen modulated , except the ARC-5 series.More parts would need to be added to the ARA/ATA/SCR-274 series for plate modulation on them, but I suppose the ARC-5 could easily be screen modulated with no modification.

The regulator on 200V is helpful.



    On Sunday, February 9, 2020, 12:55:49 PM EST, Peter Bertini <radioconnection at gmail.com> wrote:  
 
 I'm probably in the wrong group... but...
Beyond the bewildering confusion deciphering between ARA/ATA, CBY/CCT, SCR-274, BC-xxx, T-xx/ARC-5 variants... I am looking for a common denominator..
Assuming one  is NOT interested in the correct accessories, cables, modulators, dynamotors, etc...
And for the sole purpose of putting any variant on the air with minimal modifications to transmitter itself... don't wantshelf queens, I want these to be usable and on the air.  
1: Can either variant be either screen or plate modulated? I don't see anything that would preclude doing so.. 
2: Any suggestions on how a beat-up FT-226-A tray might accommodate either style transmitter? I am thinking having each
rear connector wired for a particular transmitter pin out, but how to avoid accidentally putting the wrong version in the wrong
slot? One side Army, one side Navy...
3: For power... a modified Heathkit PS-23 junker... get rid of the voltage doubler nonsense and use full wave bridges on the
high and low voltage windings. Series the two to provide around 125 vdc for the RX, and around 500 vdc for the TX.
4: Add a half-wave voltage doubler on the 12.6 winding for DC filament voltage for the transmitter filaments and relays.
5 Any benefit to regulating the 200 VDC for the 1626 oscillator? I suspect it would not hurt. 
6: transmitters will be modified following AB5S's suggestions regarding relay adjustments, etc  

Flame away...______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: https://www.qsl.net/donate.html  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20200209/66982abe/attachment-0001.html>