Re: SX-110 2nd IF Circuit Design
Thanks, Mike!? In contrast, National often used all 6SG7’s in their IF design (such as in my HRO-60).? The difference is an interesting point. ? 73 – Steve, KW4H ? Hello Steve!
Excellent question!
The 6SG7 has higher gain than the 6SK7.
The 6SK7 can handle stronger signals.
And the 6SK7 provides better AGC control since it’s a remote cutoff tube.? The 6SG7 is semi-remote cutoff. ? I hope this helps!
Mike/
K5MGR
__________________________________ ? Mike Langner
929 Alameda Road NW
Albuquerque, NM 87114-1901 (505) 898-3212 home/home office
(505) 238-8810 cell
mlangner@... ?
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From: [email protected] <[email protected]> On Behalf Of KW4H via groups.io
Sent: Thursday, October 27, 2022 2:17 PM
To: [email protected]
Subject: [HallicraftersRadios] SX-110 2nd IF Circuit Design? All, ? A curiosity – I’m restoring a SX-110 at the moment and see that a 6SK7 was used for the 2nd IF, while a 6SG7 is used for the 1st IF.? I’m trying to understand why that is – why not use two 6SG7’s?? What was magical about the 6SK7? ? 73 – Steve, KW4H ?
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Re: SX-110 2nd IF Circuit Design
Hello Steve!
Excellent question!
The 6SG7 has higher gain than the 6SK7.
The 6SK7 can handle stronger signals.
And the 6SK7 provides better AGC control since it’s a remote cutoff tube.? The 6SG7 is semi-remote cutoff. ? I hope this helps!
Mike/
K5MGR
__________________________________ ? Mike Langner
929 Alameda Road NW
Albuquerque, NM 87114-1901
(505) 898-3212 home/home office
(505) 238-8810 cell
mlangner@... ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of KW4H via groups.io
Sent: Thursday, October 27, 2022 2:17 PM
To: [email protected]
Subject: [HallicraftersRadios] SX-110 2nd IF Circuit Design? All, ? A curiosity – I’m restoring a SX-110 at the moment and see that a 6SK7 was used for the 2nd IF, while a 6SG7 is used for the 1st IF.? I’m trying to understand why that is – why not use two 6SG7’s?? What was magical about the 6SK7? ? 73 – Steve, KW4H ?
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SX-110 2nd IF Circuit Design
All, ? A curiosity – I’m restoring a SX-110 at the moment and see that a 6SK7 was used for the 2nd IF, while a 6SG7 is used for the 1st IF.? I’m trying to understand why that is – why not use two 6SG7’s?? What was magical about the 6SK7? ? 73 – Steve, KW4H ?
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Re: Need HT-37 Carrier Oscillator Crystal for 10M Band
I checked the HT37 and it only had one xtal in it. Just so happened to be 32.000 If your address is correct in QRZ, let me know and I will get it sent off to you tomorrow.
On Thu, Oct 27, 2022 at 1:54 PM, chuckbell1952 via groups.io <chuckbell1952@...> wrote: Hi Richard. I have a HT37 chassis with lots of parts still. I will check and see if the xtal is still there. If so, it's yours. I will try to head to the shack in a few hours to check. Chuck K3HHP? On Thu, Oct 27, 2022 at 1:28 PM, Ricky KR7W <599kr7w@...> wrote: Greetings,
Would anyone happen to have a 32.000 MHz Crystal for the HT37 they are willing to sell?
From the manual:
Thanks in Advance,
Ricky KR7W
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Re: Need HT-37 Carrier Oscillator Crystal for 10M Band
Hi Richard. I have a HT37 chassis with lots of parts still. I will check and see if the xtal is still there. If so, it's yours. I will try to head to the shack in a few hours to check.
On Thu, Oct 27, 2022 at 1:28 PM, Ricky KR7W <599kr7w@...> wrote: Greetings,
Would anyone happen to have a 32.000 MHz Crystal for the HT37 they are willing to sell?
From the manual:
Thanks in Advance,
Ricky KR7W
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Need HT-37 Carrier Oscillator Crystal for 10M Band
Greetings,
Would anyone happen to have a 32.000 MHz Crystal for the HT37 they are willing to sell?
From the manual:
Thanks in Advance,
Ricky KR7W
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I would be interested in the HT-4 if it becomes available. Please feel free to PM me.
Thanks
Gary
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So I sold my BC-610E? last month here in Michigan.?
It was on the air as a daily user when I sold it. 100% complete. 614 SA, some spare 250THs, coils for 20, 40, 80 and 160m plus manuals.
I let it go for about $500 I think.
It is on the air at its new home and I hear it often, so it's well cared for.
In my opinion, it was more important to me that it went to someone who was really going to put it on the air, rather than be put in storage somewhere.
My .02?
73
W8tow
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Good question. In helping a friend to, in timely fashion, dispose of his collection last year, his on-the-air BC-610F, BC-614 speech amp. plug-in set, and coils, interconnect cables, etc., all in fully operational condition, went for about $750, picked up.? The price, all things considered, was reasonable.? It seems that condition, condition, condition is the key. Spare 250th tubes will be an asset, too.? As with the '610, most of his large MIL collection was picked up by relatively local hams, most known to him.
K3HVG
On 10/26/2022 1:26 PM Michael OBrien <k0myw@...> wrote:
Th transmitter
On Wednesday, October 26, 2022, 12:12:28 PM CDT, momnpear <pearsrepairs@...> wrote:
I am trying to establish a sales price for a family of an SK who has, among other items, a VERY nice HT4. I have not seen it in 4 years, but helped move it in place and recall it being complete, all good components, and near mint condition.
Could you all chime in with some ballpark value? Nothing really on EPay , even in history.
Thanks,
Pear
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Th transmitter
On Wednesday, October 26, 2022, 12:12:28 PM CDT, momnpear <pearsrepairs@...> wrote:
I am trying to establish a sales price for a family of an SK who has, among other items, a VERY nice HT4. I have not seen it in 4 years, but helped move it in place and recall it being complete, all good components, and near mint condition.
Could you all chime in with some ballpark value? Nothing really on EPay , even in history.
Thanks,
Pear
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I am trying to establish a sales price for a family of an SK who has, among other items, a VERY nice HT4. I have not seen it in 4 years, but helped move it in place and recall it being complete, all good components, and near mint condition.
Could you all chime in with some ballpark value? Nothing really on EPay , even in history.
Thanks,
Pear
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Hallicrafters SR-75 Transceiver Coil Information
Most everyone I located who owned a SR-75 didn’t have the coils. Thanks to Chris Farley he had the 40, 20 and 10 meter coils. I have the 80 meter coil. In order to have a complete set I built my own. ? The coil forms are phenolic measuring 3.25” long, 1.375” in diameter and .05” thick. I purchased the phenolic from McMaster Carr and trimmed to size on my chop saw. ? The banana plugs are available from Mouser among other places and are Pomona model 3265. Three plugs are used on 80 and 20 meters, two on the 40 and 10.11 meter coils. ? The 6/32” spacers for the 80 and 20 meter coils are .375” long and while the original were phenolic I used black nylon also from McMaster Carr. I used dipped mica caps for the 80 and 20 meter coils. ? The coil forms are drilled with holes for the 6/32” screws that mount to the banana plugs with or without spacers and two other holes which contain thin solder lugs are under the screws, then penetrate the phenolic where the coil wire is attached. ? The 80 meter coil is 26 turns of #20 enameled wire closely spaced. The 40 meter coil is 20 turns of #18 tinned copper measuring 10.3 uh. The 20 meter coil is 12 turns of #18 tinned copper measuring 4.3 uh. The 10/11 meter coil is 6 turns of #18 tinned copper wire measuring 1.28 uh. ? I can send pictures to anyone interested and will try to upload to the group files. ? 73, Roger, NJ2R
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Re: SR-75 transceiver notes (Price)
According to Radios By Hallicrafters by Chuck Dachis the S-38B was priced at $49.50 and the SR-75 was priced at $79.95. ? ?
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From: [email protected] < [email protected]> On Behalf Of Jeffrey Benedict Sent: Saturday, October 22, 2022 2:00 AM To: [email protected]Subject: Re: [HallicraftersRadios] SR-75 transceiver notes ? That's kinda cool! ?Those days were kinda different for starting hams. ? Does anyone know the difference in price between a S-38 and this radio? Depending on price, it may have been cheaper to use and S-38 and make some sort of a 10 watt transmitter. But, again, that might be a little bit out of the ability range of a teen aged novice, especially one without a club or elmer.
Jeff K7AIL
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FS SX-101A Power Transformer
Pulled from working
receiver.
?
$30 plus
shipping.
?
Tom
W3TA
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Re: FS:#46 BULBS - SCREW IN TYPE
Joe, thanks but I got what I needed, # 40 bulbs.
K2WH
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FS:#46 BULBS - SCREW IN TYPE
Someone was looking for screw-in type bulbs. If a #46 will work, contact me direct via
WS?E ON QRM.COM? OR? ARRL.
Joe, WS?E, TX
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Do you have a function switch for same?tnx 73 dan
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I have a real nice
HT-32 front panel for sale. $20 plus shipping.
?
Email?if
interested, can send pics
?
Tom
W3TA
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Mike Langner
Ricky KR7W
Steve Marquie
Bill (Group Owner)
Joe Hargis