[AMRadio] COLLINS KWS 1 power supply questions

David Knepper collinsradio at comcast.net
Tue Nov 3 09:29:13 EST 2009

Solid state plug ins are not recommended.  The higher voltage will put a
strain on the input choke.

Use 3B28 tubes instead.

David Knepper, W3ST-W3CRA
Publisher of the Collins Journal and 
Secretary to the 
Collins Radio Association
-------Original Message-------
From: Jim Wilhite
Date: 11/2/2009 9:17:26 PM
To: Discussion of AM Radio in the Amateur Service
Subject: Re: [AMRadio] COLLINS KWS 1 power supply questions
Greg if you replace tube rectifiers with SS plug in units, do remove the
filament line and take the output from pin 4 in the case of 866s.  Other
wise you might ruin a transformer someday and you really don't want
that.  I don't know about the KWS 1, but if the voltage is taken from
the centertap, it would not be good.
----- Original Message -----
> Hi:
> I finished rebuilding the power supply on my new KWS 1.  I have a
> couple of questions for the group:
> Is there a substitute for the HV fuse in the 2 kvdc line? Is the
> original still being manufactured?
> I'm going to use solid state plug in diodes instead of the 866A's.  Do
> I need to disconnect the filament supply to the 866A sockets?
> Thanks
> Greg
> Kinston NC
> ______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

More information about the AMRadio mailing list

This page last updated 24 Jan 2018.