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Uniden or Galaxy variant?

One is mobile and is a lot like the 98VHP...

One uses a LM324/326 Quad Op amp - while the other uses more like the Cobra 142 - the following is for you if you have the Uniden variant...

Washington's use TR15 like an Op amp that sets Squelch but also uses a capacitor C27 for control.

IF the caps are shorted out because they're dry, it can cause the symptoms you're dealing with.

Might need a couple of quick re-capper' parts before it finishes firing up.

TP 3 is the "detector" amp - there are electrolytic caps in that area too C24, C25, C26 and C180...

Line that feeds from there to the front PIN diode section uses TR12, FET 1 and TR11 for AGC and front end control...RF gain affects TR9 - so look for RX voltages - and if the Clarifier has been messed with - look for that section - because it may have killed TR9.

It has been around a while...

<blockquote data-quote="Handy Andy" data-source="post: 643792" data-attributes="member: 52309">Uniden or Galaxy variant?One is mobile and is a lot like the 98VHP...One uses a LM324/326 Quad Op amp - while the other uses more like the Cobra 142 - the following is for you if you have the Uniden variant...Washington&#039;s use TR15 like an Op amp that sets Squelch but also uses a capacitor C27 for control.IF the caps are shorted out because they&#039;re dry, it can cause the symptoms you&#039;re dealing with.Might need a couple of quick re-capper&#039; parts before it finishes firing up.TP 3 is the &quot;detector&quot; amp - there are electrolytic caps in that area too C24, C25, C26 and C180...Line that feeds from there to the front PIN diode section uses TR12, FET 1 and TR11 for AGC and front end control...RF gain affects TR9 - so look for RX voltages - and if the Clarifier has been messed with - look for that section - because it may have killed TR9.It has been around a while...</blockquote>

[QUOTE="Handy Andy, post: 643792, member: 52309"] Uniden or Galaxy variant? One is mobile and is a lot like the 98VHP... One uses a LM324/326 Quad Op amp - while the other uses more like the Cobra 142 - the following is for you if you have the Uniden variant... Washington's use TR15 like an Op amp that sets Squelch but also uses a capacitor C27 for control. IF the caps are shorted out because they're dry, it can cause the symptoms you're dealing with. Might need a couple of quick re-capper' parts before it finishes firing up. TP 3 is the "detector" amp - there are electrolytic caps in that area too C24, C25, C26 and C180... Line that feeds from there to the front PIN diode section uses TR12, FET 1 and TR11 for AGC and front end control...RF gain affects TR9 - so look for RX voltages - and if the Clarifier has been messed with - look for that section - because it may have killed TR9. It has been around a while... [/QUOTE]

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