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I always wondered why there was no built-in side tone for CW in this rig. Possible reasons: Primarily intended for SSB use? Primarily intended as a mobile rig? Expected CW ops to be using the Halli paddle and keyer (with audio)? Does anyone know? I have an SR-150 in very nice cosmetic condition.? I haven't used it in a few years - but I have had it on the air.? I did a little CW with it - but that was rather difficult w/o a sidetone.? I'd like to get it on the air again one of these days. Nice rig: looks good; very quiet receiver. Bob C. WA9JIB = = = = =
On Friday, March 29, 2024 at 04:17:55 PM PDT, waltcates <cateswa@...> wrote:
There are those who say the SR-150 was Hallicrafters best ever transceiver.
Thanks for the kind words on the repair document. They are all living documents, ever few months I take one and update it.
Walt Cates, WD0GOF
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A majority of acceptance is not proof of correctness.
From: [email protected] <[email protected]> on behalf of Don VE3IDS <ve3ids.don@...>
Sent: Friday, March 29, 2024 6:01 PM To: [email protected] <[email protected]> Subject: [HallicraftersRadios] SR 150 ?
Last summer I picked up a SR 150 and matching power supply/speaker. It was in the typical dirty scratched condition and didn't work. I wanted to say that Walt's repair manual was invaluable. I did the wash down with simple green rather than
scrubbing bubbles because it was available. That worked very well followed by the garden hose and a few days in the summer sun. I sanded the case to bare metal and sprayed it with rustoleum hammered finish pewter. I recapped the supply and the electrolytic
capacitors in the rig per Walt's doc. I followed the alignment tips and found that I needed to shift the USB carrier oscillator a bit to bring up the CW power levels. Thanks Walt, the tips in your manual are gold. I'm not sure if you were a technical writer
or not, but I haven't seen better service docs. I still need to spend time on the vfo tracking across the dial but that can come later. I also added a side tone oscillator as I am primarily a CW op and prefer using a bug. I made up a little board with a couple
relays, one to switch the grid block voltage and one to switch the audio output from my side tone oscillator. I now have 12 volts on the key instead of grid block voltage. This is all easily removable with no non reversible changes and I leave a printed note
with the mod details inside the cabinet in a cool location behind the bottom cover. I am impressed with how stable the vfo is and the nice comfortable sound to the receiver in this model. The first contact was a nice chat with an op in France. Lots of fun!?
73 Don ve3ids?
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