[Hallicrafters] SR-150

[Walt Cates]

K3 and K3 in the SR-150 are rather unique. They have 780 ohm/16vdc coil. It is critical because the coils of K2 and K3 in parallel form the 390 ohm cathode resistance for the audio output tube (V13). Commonly the relays coil resistance varied from 740 to 790 ohms. Anything outside that range will cause V13 to cutoff or saturate and the relays will not pull in on turn on or de-energize in TX mode. HAYSEED RADIO will soon have a mod kit for the K2/K3 problem in the SR-150. 

 
Best Regards, Walt Cates, WD0GOF 

We will not be judged
on what we believe, but on what we put into practice.



 
> From: robert at isquare.com
> Date: Sun, 1 Feb 2015 17:27:49 -0500
> To: ChuckGroome at aol.com
> CC: hallicrafters at mailman.qth.net
> Subject: Re: [Hallicrafters] SR-150
> 
> Chuck,
> 
> It's a common item. Check eBay for dozens of possibilities.
> 
> 73, Bob
> WØYVA
> http://www.isquare.com/personal_pages/ras-hardware.htm
> 
> On Feb 1, 2015, at 4:49 PM, chuck groome via Hallicrafters <hallicrafters at mailman.qth.net> wrote:
> 
> > Im in need of a K2 Relay for the SR-150.12vdc 3pole double throw. size  
> > matters. original Pt # 021-000651 does any one have one or know where to  
> > get.used is ok as long as it is guarenteed to be good. Thanks 
> > _chuckgroome at aol.com_ (mailto:chuckgroome at aol.com) 
> > 
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