[Hallicrafters] SR-150 problem

[Jim Liles]

Hi Murray:
Remove every screw on the radio and Deoxit the hole.  Deoxit every ground 
point at the star washer and gently tap the star washer to reset the 
connection.  "Every ground connection".  You probably will have a new radio. 
One other common problem is the point gap on the two small yellow 10 cent 
relays has universally shrunk as a result of phenolic warp. Adjust them or I 
have a part number for a new replacement --- I'll forward it later, have to 
dig it out.  The relay must be 750 to 800 ohms or the diode switches for het 
osc and balanced mixer will malfunction.  Kindest regards Jim K9AXN

Original message:

> Message: 4
> Date: Sat, 25 Jul 2009 21:28:09 -0700
> From: "Murray Grandy" <mgrandy at telus.net>
> Subject: [Hallicrafters] Need help with Hallicrafters SR-150.
> To: "HALLICRAFTERS" <hallicrafters at mailman.qth.net>
> Message-ID: <1831B23D09524B4689733582C62AB15F at murreypc>
> Content-Type: text/plain; charset="Windows-1252"
>
> My SR-150 was working great until I removed the front panel to do some 
> touch-up etc.
>
> After putting everything back together I find that the transmit is not 
> working. I have looked at all the wiring etc that might have been affected 
> by removing the front but just can?t seem to find what went wrong. What 
> happens is this. Using the PTT there is steady power out (about 15 watts 
> or so) with the mic gain turned all the way down and no audio into the 
> mic. On CW, there is no power out at all with RF gain turned all the way 
> up. Is there a service manual available for this radio, does anyone know? 
> I have the original manual that came with it but it is not much good in 
> this case. The receiver seems to be working ok. I would appreciate any 
> help with this problem.
>
> Murray (VE7MGY).