[GreenKeys] Range Finder Setting/Distortion usage?

[Nick England]

There must have been a good reason
I think all 28 ASR and many (most?) versions of 28KSR and 28RO have a line
relay and internal loop used to key the selector magnets. Some instead have
transistor or tube SMD.

On Mon, Feb 6, 2023 at 5:46 PM W2HX <w2hx at w2hx.com> wrote:

> My theory is that an ASR can have things like an aux reperf and
> who-knows-what-else in it, so they thought it best to have a local loop
> supply, lest they bog-down the external supply with too many widgets in the
> cabinet. Whereas the KSR doesn't have other gadgets and can be driven right
> from the external loop. Just my thoughts on the matter.
>
> Right now, I am using an ST-6 for a loop supply (and also for 170 shift)
> but mine is of the newer ilk that doesn't have a rheostat, only a fixed
> power resistor. I now find my loop running at about 50mA due to a lot of
> devices on the loop.
>
>
> 73 Eugene W2HX
> Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos
>
>
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
> On Behalf Of John W9DDD
> Sent: Sunday, February 5, 2023 10:22 PM
> To: harold at w6iwi.org
> Cc: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Range Finder Setting/Distortion usage?
>
> 2874WD and 2875WD show a 28 KSR without line (polar) relay.  I have not
> yet found a diagram for an ASR without the line relay, but when I do, my
> ASR will also be without the relay.
>
> John,
>
-- 
Nick England K4NYW
www.navy-radio.com
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