?

?

On Fri, Mar 29, 2024 at 7:17 PM, 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

?

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?

The Drake TR-4 came with 2.1 kHz filters.? I replaced them in mine with the aftermarket Inrad 2.5kHz filters.

Not only do I get much better reports on the air but the receive fidelity is a LOT easier to listen to!
I get great audio reports with my HT-32B.? I think it's got a 3kHz filter in it?


I couldn't find the filter specs in the SR-400 manual.? I guess they really don't say what the BW? is. but it would seem to be somewhere around 2.3-2.5 kHz based on the shift in the carrier frequencies?? I guess the only way to know for sure would be to "sweep" it.


--
73/Rick
W4XA
__________________________________
All posts are created using OpenSuSE Leap 15.5 x64 Linux

*A lot of people complained about the sidetone issue, that is why the
400 and 2000 have sidetone.*
*
*
*
*
*Walt Cates, **WD0GOF*
*_ <> _*

*A majority of acceptance is not proof of correctness. *

*
<>**
*

------------------------------------------------------------------------
*From:* [email protected] <[email protected]> on
behalf of robert cesarone via groups.io
<engineerbob4449@...>
*Sent:* Friday, March 29, 2024 7:22 PM
*To:* [email protected] <[email protected]>
*Subject:* Re: [HallicraftersRadios] SR 150
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*
*_ <> _*

*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