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Ok! Good to know - nice to have someone like you aboard - willing to make this work - thanks.

Ok, let's see - you have PA but no "thunk" - ok, let's look or jump ahead a little - can you adjust the Squelch control at all? I mean - turn down the knob all the way - and power up then power off - any thunk?

Do the same on it all the way up - same result or do you hear a thunk now?

IF so it's wires then are reversed - just reverse the header - unsoldering then re-soldering them in the other direction or check the pot itself - and it uses two wires - that go to the knob. can you see the condition of the wires? Make sure they are not disconnected from the Pot.
There is a Squelch Trimmer pot on the board - VR3 - check it's condition. Tweak it with the volume turned up 70% or so...adjust the Squelch control fully Counter Clock wise for this to see if you hear a hiss.

Trace those wires back to the board - they usually go to a header - look on the bottom side of the board for the headers traces and check their solder condition - reheat them if needed and check for Squelch operation - it needs to be fully counter clockwise to be considered off. Tweak VR3 as needed...

VR 3 is located by and towards the Front panel from the TR23 Regulator.

<blockquote data-quote="Handy Andy" data-source="post: 714436" data-attributes="member: 52309">
<ul>
<li data-xf-list-type="ul"></li>
</ul>Ok! Good to know - nice to have someone like you aboard - willing to make this work - thanks.Ok, let&#039;s see - you have PA but no &quot;thunk&quot; - ok, let&#039;s look or jump ahead a little - can you adjust the Squelch control at all? I mean - turn down the knob all the way - and power up then power off - any thunk?Do the same on it all the way up - same result or do you hear a thunk now?<ul>
<li data-xf-list-type="ul">IF so it&#039;s wires then are reversed - just reverse the header - unsoldering then re-soldering them in the other direction or check the pot itself&nbsp; - and it uses two wires - that go to the knob. can you see the condition of the wires? Make sure they are not disconnected from the Pot. 
</li>
<li data-xf-list-type="ul">There is a Squelch Trimmer pot on the board - VR3 - check it&#039;s condition. Tweak it with the volume turned up 70% or so...adjust the Squelch control fully Counter Clock wise for this to see if you hear a hiss.</li>
</ul>Trace those wires back to the board - they usually go to a header - look on the bottom side of the board for the headers traces and check their solder condition - reheat them if needed and check for Squelch operation - it needs to be fully counter clockwise to be considered off. Tweak VR3 as needed...VR 3 is located by and towards the Front panel from the TR23 Regulator.</blockquote>

[QUOTE="Handy Andy, post: 714436, member: 52309"] [LIST] [*] [/LIST] Ok! Good to know - nice to have someone like you aboard - willing to make this work - thanks. Ok, let's see - you have PA but no "thunk" - ok, let's look or jump ahead a little - can you adjust the Squelch control at all? I mean - turn down the knob all the way - and power up then power off - any thunk? Do the same on it all the way up - same result or do you hear a thunk now? [LIST] [*]IF so it's wires then are reversed - just reverse the header - unsoldering then re-soldering them in the other direction or check the pot itself - and it uses two wires - that go to the knob. can you see the condition of the wires? Make sure they are not disconnected from the Pot. [*]There is a Squelch Trimmer pot on the board - VR3 - check it's condition. Tweak it with the volume turned up 70% or so...adjust the Squelch control fully Counter Clock wise for this to see if you hear a hiss. [/LIST] Trace those wires back to the board - they usually go to a header - look on the bottom side of the board for the headers traces and check their solder condition - reheat them if needed and check for Squelch operation - it needs to be fully counter clockwise to be considered off. Tweak VR3 as needed... VR 3 is located by and towards the Front panel from the TR23 Regulator. [/QUOTE]

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