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Sets, Parts and Service Information Wanted (private buyers only, no swaps) If you need help obtaining components, sets or equipment, post a message here. Private buyers only - no traders. No swaps.

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Old 8th Apr 2021, 9:08 pm   #1
kimbottles
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Default Lowe HF SP-150/AP-150

I am searching for a clear copy of the SP-150 (AP-150) circuit diagram. All I can find on the Internet is a fuzzy copy where I cannot read the component values. I am trying to repair an AP-150 where everything works except the S meter. Hard to trace things out without a readable circuit diagram. Thanks! Kim - K7IM Blakely Harbor, WA, USA
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Old 8th Apr 2021, 9:50 pm   #2
Julesomega
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Default Re: Lowe HF SP-150/AP-150

Sorry I can't help Kim: I suppose you've tried on https://groups.io/g/LoweHFReceivers?
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Old 9th Apr 2021, 11:38 pm   #3
kimbottles
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Default Re: Lowe HF SP-150/AP-150

After I posted the request I found a fairly readable one on that website, so yes, now we have a decent copy and am making progress. Looks like Diode D-4 is toasted, having a new 1N914 coming from Amazon today, should be able to switch it out later today. Thanks!!
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Old 10th Apr 2021, 11:19 pm   #4
Julesomega
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Default Re: Lowe HF SP-150/AP-150

Just for the record, here is the reply Kim had from the group:

The AP-150 was simply a name change to the SP-150 for marketing reasons (snip) the schematics are available in the files section
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