Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Emanuele RE I decided to leave it alone, I give up. Don¡¯t do that, the radio is 99.777% , just some strange thing left. It¡¯s ok to take a break and let the brain cool down.
I follow your
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don Root
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#31605
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Put it aside but don't give up on it.
How did you decide the IF frequency? When the IF has a crystal filter the crystal determines the exact IF frequency but when there is no crystal you just
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Richard Knoppow
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#31604
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Guys,
I performed a complete RF alignment once again.
I used a sig-gen and the SA just as a "receiver" to "see" the LO signal and followed the service manual instructions.
LO was fine in all bands
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Emanuele Girlando
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#31603
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Re: Website Anniversary
Great and Useful site!! Thanks
wa3gin
[email protected]> wrote:
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Dave Jordan
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#31602
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Re: Website Anniversary
Happy Anniversary
Paul Bowman
KC3FVD
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Paul Bowman
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#31601
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Re: Website Anniversary
Happy Anniversary!
????? ? Joe Connor
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Joe Connor
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#31600
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Website Anniversary
Well believe it or not, its been 20 years, this site has been active and strong for Hallicrafters Radios.
Started in 2005 as a lark, I am amazed that we now have 1,078 members.
With thanks to all
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Bill (Group Owner)
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#31599
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Edited
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Richard what does turning the dial clockwise actually mean? If it was a rotating pointer on a fixed scale it is fairly clear that the POINTER rotates CW. And the numbers stay fixed, but on a rotating
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don Root
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#31598
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Emanuele, this is late.
Your statement here seems to eliminate the idea that the BS setting is the problem.
The other day while taking my truck tire off at a tire place, the hex part of the security
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don Root
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#31597
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Re: Missing page S2001A
Thanks Pete. I appreciate the complement.
I find it very gratifying that my work helps someone bring a piece of
equipment back to life. It also provides me with the joyful option of
bringing a
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Peter A Markavage
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#31596
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Emmanuel Oh I sent more cross-posting.
Now back at square one ?
Entropy is increasing quickly.
So you are back to the apparent too-much capacitance or inductance, and similar problem for 4
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don Root
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#31595
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Note that the direction of the dial and knob for bandspread are reversed. See instructions about replacing the dial string. The index mark on the dials is at the LOW end, with capacitors fully
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Richard Knoppow
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#31594
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Where its supposed to be I think.
As far as your last post, I was looking for something like this. I was tempted to suggest getting rid of the high tech instruments and sticking to a regular
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Richard Knoppow
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#31593
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Richard you deleted my image in the reference so others might wonder about some stuff missing, but no real matter there.
My thought to verify the bandspread is simply to turn the BS dial CW ? and
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don Root
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#31592
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Edited
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Richard, we do cross posted.
Today I also started to think the band spread variable capacitor was stringed reversed..
But I checked it and, in fully clockwise position (the one indicated for
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Emanuele Girlando
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#31591
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
*Wait a minute guys ... SORRY guys!!!!!*
Using the SA for RF alignment led me astray, .. and you all with me!
Don, you say need education ... from my side I would say I need a medical treatment for
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Emanuele Girlando
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#31590
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Edited
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Which way is the band spread capacitor facing? Capacitance should be minimum with dial at zero. This is Halicrafters design, on non-calibrated band spreads the dial indicates the amount of
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Richard Knoppow
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#31589
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Emanuele
I NEED EDUCATION on reading these new scopes and such
Wrt your previous post; I have no reason to believe there is a problem in the IF.
My last post made wrong assumptions on the
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don Root
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#31588
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Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!
Hy.
I can confirm that the dummy antenna is not influencing the peaks points.
I tried the tests just getting the TG output physically close to the antenna connector and nothing changed but the
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Emanuele Girlando
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#31587
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Re: Missing page SR-2000
HAHA,
WellPete, thanks for your thoughts. You sound a bit sour this morning.
Cheer up, it's Terrific Thursday.
I've had great luck with reproduction from the Internet. Print and photo
quality is
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Dave Jordan
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#31586
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