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Re: Website Anniversary
Great site - thank you Bill! On Fri, Feb 7, 2025 at 5:52?PM waltcates via <cateswa=[email protected]> wrote:
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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!
开云体育? Emanuele and all This is from BAMA for mark 1A and 1B? and makes no sense to me, ???so I rewired it at the right. What say you all?? Do you go with Halligans version? Don ?end -- don??? va3drl |
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Re: Website Anniversary
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From: [email protected] <[email protected]> on behalf of Bill (Group Owner) via groups.io <k2wh@...>
Sent: Friday, February 7, 2025 1:29 PM To: [email protected] <[email protected]> Subject: [HallicraftersRadios] Website Anniversary ?
Well believe it or not, its been 20 years, this site has been active and strong for Hallicrafters Radios.
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Started in 2005 as a lark, I am amazed we now have 1,075 members.
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With thanks to all our Hallicrafters Experts on this site and they are experts for sure.e
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Regards, and have fun.
K2WH
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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!
开云体育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 comments again; all very clear.?? In my sleep, it came to mind that the main dial scale must be set properly. You no doubt have checked this, but maybe there was some slippage since then? So ?maybe there are set screws on the dial scale hub? .. that might slip? Also, you must know this but, at low frequencies, the RF tanks will tune much narrower, and so a bit of? unwanted offset will knock the signal down greatly. Why not do a test: instead of setting the RF band 1 trimmers, at 1400 , set them at ?the low end 600,700? ..and see if they [RF1 and mixer tanks] can be tuned down there by turning the trimmers CW, and if it “aligns”, then try the ?real sensitivity at the low end using the antenna.? If it won’t align there, maybe take a scan of the tanks responses at say 600KCs so you can see if they are too high or too low. I hope you understand my wording. Then you might learn if it ?“tunes low” ?all over the band, or one end is low and the other hi. ?Since you have that Fancy HP gadget you must be able the verify the resonant curves of all tanks at the Hi and the Low end of the band{s}. OF course this is not aligning, it is testing ?to find out where things go wrong. ???????? Must be late there by now spero che tu stia dormendo bene From: [email protected] [mailto:[email protected]] On Behalf Of Emanuele Girlando via groups.io
Sent: Friday, February 7, 2025 4:02 PM To: [email protected] Subject: Re: [HallicraftersRadios] 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 with LO signal higher than the signal by the IF value (452KHz in my case) in all bands but the n. 4 where it was below. The dials track the sig-gen signal with very low error in all bands. The ANT and MIX trimcaps of bands 1&2 didn't peak, exactly as before. I had to leave them fully released (lower C) to get the MAX output possible. During alignment the BS dial knob was fully CW and , I confirm once again, the BS cap had the plates all out (minimum capacity). The radio performs well in all bands but the lower part of band 1 (<1MHz, as before). ? I decided to leave it alone, I give up. ? Thank you very much for your precious support, guys. Ciao. Emanuele (IU1KNR). ? ?
-- don??? va3drl |
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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 with LO signal higher than the signal by the IF value (452KHz in my case) in all bands but the n. 4 where it was below.
The dials track the sig-gen signal with very low error in all bands.
The ANT and MIX trimcaps of bands 1&2 didn't peak, exactly as before. I had to leave them fully released (lower C) to get the MAX output possible.
During alignment the BS dial knob was fully CW and , I confirm once again, the BS cap had the plates all out (minimum capacity).
The radio performs well in all bands but the lower part of band 1 (<1MHz, as before).
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I decided to leave it alone, I give up.
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Thank you very much for your precious support, guys.
Ciao.
Emanuele (IU1KNR).
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Re: Website Anniversary
Great and Useful site!! Thanks wa3gin On Fri, Feb 7, 2025 at 2:29?PM Bill (Group Owner) via <k2wh=[email protected]> wrote:
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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 our Hallicrafters Experts on this site and they are experts for sure.
?
Its been educational.
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Regards, and have fun.
K2WH |
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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!
开云体育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 scale with a fixed pointer, the physical scale might rotate CW but the values on the scale might be going up or down as you rotate. If they had a 1…100 scale ?one could just say turn it to position 1 or 100, but? I fear the use of CW,CCW with Rotating dials or Rotating scales ?can be confusing.? ? the condition while attempting aligning is that there might just be too much capacitance.. obvious on two bands in 2 tanks each. So now in this wonky situation, just to see what id going on. Ignore all that and try to get the tanks to resonate higher?? ?by ensuring the ?BS capacitor rotor itself is wide open. ?I thought Emanuele said he did that, but I’m not sure. ?? ? From: [email protected] [mailto:[email protected]] On Behalf Of Richard Knoppow via groups.io
Sent: Thursday, February 6, 2025 7:00 PM To: [email protected] Subject: Re: [HallicraftersRadios] 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 Richard you deleted my image in the reference so others might wonder
_._,_._,_ -- don??? va3drl |
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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!
开云体育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 nut shattered, leaving a small bit holding the wheel on and no way to get it loose. Finally today a mechanic guy worked and worked and finally got it out. It takes persistence sometimes. ? From: [email protected] [mailto:[email protected]] On Behalf Of Emanuele Girlando via groups.io
Sent: Thursday, February 6, 2025 5:21 PM To: [email protected] Subject: Re: [HallicraftersRadios] 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 alignment), the cap is at minimal capacitance (blades all out). ? Emanuele (IU1KNR). -- don??? va3drl |
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Re: Missing page S2001A
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Thanks Pete. I appreciate the complement.
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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
possibly bug invested, stored in a garage or basement for 50 of 60 years into a
worthwhile and useful document that others can read, use and enjoy.
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Of course, one can find poorly scanned, incomplete, and highly marked up
pages all over the Internet, but even when printed, crap is crap, and stuff is
always lost in the transition.
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I just finished a military manual for a customer. Roughly 200 pages but
easy to do even though every page, because of age, was brown. My machine can
remove background paper color. But the hicker and hard part, were the five
schematics. They were 14 inches high and 52 inches wide. And I decided these
were to be done full size. A customer never has to assemble and tape any of my
manual pages.
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This entire project started back in the mid 90's as a bonding project
between father and son. Son was in his second high school year but didn't seem
to have any idea about his future life endeavors. Since I was dragging
boatanchors home to repair and get up and running,?from every hamfest I
went to, my collection of manuals for this stuff started to become a pain to
manage.? My son created database to manage all the manuals that I also kept
collecting. He also suggested creating a catalog booklet, advertising in
Electric Radio and a few other publications, and send out the catalog to all
interested parties.? I firmly believe this gave him a sense of business
activities and helped firm up (or at least give direction) to his future. He
also created my first web site and credit him for giving it its name.
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After? high school he worked for a year before applying and being
accepted at Boston Bible College at Hyde Park, MA. He felt he should earn the
money to pay for college rather then taking it for granted. For 3 summers while
in his college years, he worked at Lucent Technologies as a contractor and used
the money earned for tuition.
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My apologies to the group for rambling, but I'm very proud of my son. I
gave him a license manual when he was around seven. When he turned around 27, he
finally found the time to become KB1JTP.
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Pete, wa2cwa
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On Thu, 6 Feb 2025 12:50:53 +0000 (UTC) "peteradio@... via groups.io" <peteradio@...>
writes:
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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!
开云体育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 tank circuits.. strange… ?Emmanuel ?we don’t know the history so presumably this radio is new to you. did it ever work ok on band one? Is there a sign of somebody mucking about around the coils and bandswitch. Could there be a cross between band one and two tanks maybe due to little clearance?...another longshot Now I am just wondering out loud, the RF for the 2 HF bands seem to use transformers with slugs, and you can see them on the layout, but for band 1,2 there are trimmers shown but no transformer or coil on the layout so perhaps “L3” has a simple winding for band 1 and another for band 2 ????? same situation and question for the mixer tanks? So what would happen if L3 had a common ground connection terminal and a bad connection to ground ? OR something? ??could L3 have been changed ?another longshot Another thought; I wonder if the alignment instructions are as complete as for older radios.? My thought is that both ends of the oscillator should be set first and any interaction eliminated by repeating the C22 and C25 ?adjustments etc, then set the RF trimmers. It is hard to see it making a big difference… Richard, Emanule, whoever?? A last resort might be to? find the resonant point of each tank at the top end and the bottom end of the main tuning for bands 1 and then 2. ???? Richard has just added some confusion so this is going now as-is only thoughts. ? From: [email protected] [mailto:[email protected]] On Behalf Of Emanuele Girlando via groups.io
Sent: Thursday, February 6, 2025 5:21 PM To: [email protected] Subject: Re: [HallicraftersRadios] 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 alignment), the cap is at minimal capacitance (blades all out). ? Emanuele (IU1KNR). _._,_._,_
-- don??? va3drl |
Donald J
Bob Tragesser
don Root
waltcates
Emanuele Girlando
Dave Jordan
Bill (Group Owner)
Peter A Markavage