Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84 exptools; site ihu1h.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!ihu1h!parnass
From: parnass@ihu1h.UUCP (Bob Parnass, AJ9S)
Newsgroups: net.ham-radio
Subject: Re: Help wanted: antique SW receiver (SX-28)
Message-ID: <572@ihu1h.UUCP>
Date: Mon, 13-May-85 20:51:21 EDT
Article-I.D.: ihu1h.572
Posted: Mon May 13 20:51:21 1985
Date-Received: Wed, 15-May-85 00:28:57 EDT
References: <10587@brl-tgr.ARPA>
Organization: AT&T Bell Laboratories
Lines: 59

x 
our USENET backbone machine (ihnp4) has been erratic lately, so please
ignore any echoes of this posting:

     Hallicrafters SX28	tube layout:

		  SX28 Super Skyrider TOP VIEW

			   Rear	Panel

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

     power		    6AB7	   6H6
     xfmr
			    6SK7	   6AB7

     5Z3		    6SA7	   6B8

     6V6GT		    6SA7	    6L7

     6V6GT     6SC7   6J5   6B8	     6SK7
     ----------------------------------------------

			   Front Panel


	    _________________________________________
	   |	       Hallicrafters SX28	    |
	   |_______|__________________________________|
	   | Tube |		Function	    |
	   |_______|__________________________________|
	   | 6AB7 |  RF	amp (1)			    |
	   | 6SK7 |  RF	amp (2)			    |
	   | 6SA7 |  Mixer			    |
	   | 6SA7 |  HF	Oscillator		    |
	   | 6L7  |  IF	Amplifier (1), Noise Limiter|
	   | 6SK7 |  IF	Amplifier (2)		    |
	   | 6B8  |  2nd Detector, S-Meter tube	    |
	   | 6B8  |  AVC Amplifier		    |
	   | 6AB7 |  Noise Amplifier		    |
	   | 6H6  |  Noise Rectifier		    |
	   | 6J5  |  Beat Oscillator		    |
	   | 6SC7 |  1st Audio Amplifier	    |
	   | 6V6GT|  P.P. Audio	Amplifier	    |
	   | 6V6GT|  P.P. Audio	Amplifier	    |
	   | 5Z3  |  Rectifier			    |
	   |_______|__________________________________|


> 	I have an antique Hallicrafters SX-28 `Super Skyrider' general
> coverage short-wave receiver that I used play with when I was in high
> school. It is a good receiver and since it won't cost me much, I would 
> like to have it operating again, but I seem to have lost my manual and 
> I do not remember which tubes it uses. I recall seeing a list of its 
> tubes in an ancient CQ (QST?) or an old ARRL Handbook. Can an old-timer 
> help me out? Thanks much in advance...
-- 
===============================================================================
Bob Parnass,  Bell Telephone Laboratories - ihnp4!ihu1h!parnass - (312)979-5414