[AMRadio] AMRadio Digest, Vol 238, Issue 3

[KD]

    I know nothing really to make this comment, but is it possible the tube was added to improve on the quality of a ssb signal when the receiver was designed for AM?
    Please excuse my ignorance, I am really just curious, for the reason I am asking. 
73...



Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, May 27, 2025 at 12:14 PM, amradio-request at mailman.qth.net<amradio-request at mailman.qth.net> wrote:   Send AMRadio mailing list submissions to
    amradio at mailman.qth.net

To subscribe or unsubscribe via the World Wide Web, visit
    http://mailman.qth.net/mailman/listinfo/amradio
or, via email, send a message with subject or body 'help' to
    amradio-request at mailman.qth.net

You can reach the person managing the list at
    amradio-owner at mailman.qth.net

When replying, please edit your Subject line so it is more specific
than "Re: Contents of AMRadio digest..."


Today's Topics:

  1. SX100 with added product detector (CL in NC)


----------------------------------------------------------------------

Message: 1
Date: Mon, 26 May 2025 18:55:52 +0000 (UTC)
From: CL in NC <mjcal77 at yahoo.com>
To: amphone <amradio at mailman.qth.net>
Subject: [AMRadio] SX100 with added product detector
Message-ID: <1761958573.822538.1748285752294 at mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8

I picked up a SX100 MK1 not a MK1A, and found an extra tube that turned out to be a product detector, added in a spot directly under the notch pitch shaft at the front panel.  Did some looking around to see if there was an old ham mag article about this but nothing found yet.  It uses a 6BE6 and is nothing like the one in the SX101, but it does work.  The design uses a multi-grid converter tube like in the SX101, but not the same one or circuit components, and it does not follow anything in the ARRL Handbook from around 1962 on where they used triodes.  The tube socket the builder used is a bit unique too, it is ceramic, with the tube solder lugs actually sandwiched in the ceramic exiting out the sides, with a central metal pedestal.  Anybody ever remember someone writing about designing this and installing in the SX100 series receivers?

Charlie, W4MEC in NC


------------------------------

______________________________________________________________
AMRadio mailing list
Home: http://mailman.qth.net/mailman/listinfo/amradio
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:AMRadio at mailman.qth.net


End of AMRadio Digest, Vol 238, Issue 3
***************************************