I put my board under a magnifier glass, and I found was you have
suspected.... T3.... Why T3... because I unsoldered the wrong place
when first removing the bad Q7... removed a leg of T3 and resoldered
it not correctly....
Ok, now I've replaced only Q7... waiting to receive Q8.... I now have
13.x VDC on the collector of Q7 and Q8 when tuning.
Voltage on Q5 did not change.
Q6 still the same when hitting TUNE
B : 1.1 VDC
C : 13.45 VDC
E : 2.1 VDC ??? should be arounf 0.4 VDC
We must consider than I have Q8 missing at his moment, only a new Q7
is there, but should emitter of Q6 be ok ??? Change Q6 for a new one
and it's the same values.
Le 04-06-25, à 15:31, Dan Barker a écrit :
You sure it's not PTTL on T3? There's not a whole lot of components
between
+12 and the collectors<g>.
As to Q5, you don't mention your supply voltage, but again, there's
not a
whole lot of components between +12 and the collector. I'd say 13.4
is fine.
Dan / WG4S / K2 #2456
ps: PTTL = Poorly Tinned Toroid Leads
<snip>
Both Q7 & Q8
B : 0.6 VDC
C : 0.0 VDC !!! (should be around 13.3 VDC
E : 0.0 VDC
There is also the readings I have with driver Q5 when tuning at 2W
Q5
E : 0.6 VDC
B : 1.2 VDC
C : 13.4 VDC (should be 12.4, but... )
Any idea ???
===============================================
Jean-François Ménard / VA2VYZ
[EMAIL PROTECTED]
Amateur Radio Club of Sherbrooke, Quebec, Canada
Web site: http://homepage.mac.com/jfmenard
===============================================
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===============================================
Jean-François Ménard / VA2VYZ
[EMAIL PROTECTED]
Club d'Astronomie Amateur de Sherbrooke
Club Radio Amateur de l'Estrie
Mon site web personnel : http://homepage.mac.com/jfmenard
===============================================
===============================================
Jean-François Ménard / VA2VYZ
[EMAIL PROTECTED]
Club d'Astronomie Amateur de Sherbrooke
Club Radio Amateur de l'Estrie
Mon site web personnel : http://homepage.mac.com/jfmenard
===============================================
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