Re: Almost ready to give up but...
Clearly we disagree
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MikeM
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#252
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Re: Almost ready to give up but...
This is getting off topic, my final comment.
If fake transistors predominate just the audio world, it does beg the question, why?
Vacuum tubes for instance , they look for the brand name, the colour
By
Pentagrid
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#251
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Re: Almost ready to give up but...
By the way, did you just call Mr. Elliott a liar? He is A PROFESSIONAL
https://sound-au.com/counterfeit.htm
By
MikeM
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#250
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Re: Almost ready to give up but...
I am just passing along what almost EVERYONE on audiokarma and DIYAUDIO websites says…..
they are full of ordinary people getting fake semiconductors!
many of the people giving these warnings are
By
MikeM
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#249
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Re: Almost ready to give up but...
You stated unequivocally that "most transistors sold on Ebay are fake".? This is untrue and an unfair generalisation.
More correctly, SOME transistors sold on Ebay are fake. .
There is a simple
By
Pentagrid
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#248
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Re: Almost ready to give up but...
this is one of the many many threads on fake semi conductors from China and eBay
https://www.diyaudio.com/community/threads/fake-transistors-from-ebay.358365/
this article is most
By
MikeM
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#247
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Edited
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Re: Almost ready to give up but...
thats not what the people on all the audio sites say, do the research please
By
MikeM
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#246
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Re: Almost ready to give up but...
I would not be so scathing, most transistors sold on Ebay/Aliexpress? are not fakes. Also bear in mind these dual gate FETs are static sensitive and may have been stored/handles incorrectly by
By
Pentagrid
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#245
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Edited
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Re: Almost ready to give up but...
Most transistor sold on eBay are fakes. You should file a claim and get your money back.
By
MikeM
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#244
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Re: Almost ready to give up but...
Update:
New 3SK40 I bought off of Ebay is bad.? Same problem as the old one: G2 is kaput.? So I ordered a NTE222 from Amazon.? Awaiting delivery.
I also found the ATTN switch has seen an EMP.??
By
Bob W8RMV
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#243
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Re: Almost ready to give up but...
No need to worry about IC Q106, all that section is working, else you would not have the megacycle lock light flashing, this is the mixer chip for the Wadley loop, it takes the VFO and the harmonic
By
Pentagrid
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#242
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Re: Almost ready to give up but...
As the saying goes, I am self taught & I had a bad teacher.
I got the scope out (means I am desperate) I can see the 1st & 2nd ocs.
I can see the lock unlock working & the comb freq on the scope.
I
By
Bob W8RMV
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#241
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Re: Almost ready to give up but...
And, if the previous guy has twiddled the 1st IF? coil tuning slugs, it will need a realignment in that section. Correct alignment here is crucial.
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Pentagrid
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#240
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Re: Almost ready to give up but...
Well, it seems the tuneable IF section, 2 to 3 megs is working, the loop section, ie, megacycle selector is working, so the money goes on the second mixer back. This is a juncton FET, it may be open.
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Pentagrid
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#239
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Re: Almost ready to give up but...
Mike - I've seen many of those posts.? Looks like the SMD part is most promising.
Dayle - Yes.? All 1MHz segments lock fine.
-Bob
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Bob W8RMV
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#238
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Re: Almost ready to give up but...
Is your "lock LED flashing when tuning through the megacycle tuning?
By
Pentagrid
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#237
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Very very useful thread
I think this thread would be useful to anyone working on an FRG7
https://antiqueradios.com/forums/viewtopic.php?t=370837
By
MikeM
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#236
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Re: Almost ready to give up but...
Also this thread is very useful for you
https://antiqueradios.com/forums/viewtopic.php?t=370837
By
MikeM
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#235
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Re: Almost ready to give up but...
Check this out in reference to the 3SK40
http://amfone.net/Amforum/index.php?topic=16198.0;wap
By
MikeM
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#234
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Almost ready to give up but...
..I thought I'd give the group a try. Friend gave me an old FRG7 to fix for him.? No fine tune on the front & has some corrosion on the chassis. Symptoms:
* Only a light hiss from the speaker with
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Bob W8RMV
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#233
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