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Re: SX100 DC power plug question
Its safe. If you are concerned with accidental contact with the
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socket you can put a piece of tape across it. Or, simply unwire the socket and link the necessary wires internally. On 3/30/2024 6:49 AM, Keith wrote:
-- Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: Hayseedhamfest
My S-38E, acquired new in 1957, was a huge improvement over one tube
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regens and an old Philo console that allowed me to copy CW by listening to the hisses without a BFO. I still had the S-38E when I acquired an NC-183 and upgraded from Novice to Conditional in 1958. I loaned the S-38E to someone. I don't recall who and it hasn't been returned yet. I have an Echophone EC-1A that I've recapped and it works fine and an S-38 (no suffix) that needs new caps. Both are inferior to the S-40B that I often use with my Elmac AF-67. I have also an R-388 with a mechanical filter bank scrounged from a 51J-4 and a BC-342, very good receivers, and I still have the NC-183, but those are not much fun to move around. The S-40B often gets used instead because it's lighter and its performance is perfectly adequate for casual CW operating: a good compromise between weight and performance for someone who is no longer a teenager. I've used it a couple of times for AM as the AF-67 has a nice modulator. I use a D-104 mic and get good audio reports. Lined up on a table, the AF-67, its power supply, the S-40B, a straight key, a Vibroplex, the D-104 mic and an old headset harken one back to the '50s. Younger folks at a radio club open house have no idea what any of all that is, but some of them seem quite interested. 73, Maynard W6PAP On 6/18/24 05:12, Bob wrote:
Richard, Yes they cared about appearance. Beauty is in the eye of the |
Re: Hayseedhamfest
Richard, Yes they cared about appearance. Beauty is in the eye of the beholder but to me the most beautiful is the SX-28. Bob W4JFA? On Tue, Jun 18, 2024, 3:24 AM Richard Knoppow via <1oldlens1=[email protected]> wrote: Thank you for the compliment (I collect them). |
Re: Hayseedhamfest
Thank you for the compliment (I collect them).
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I suppose restoring classic cars is similar, one can wind up replacing nearly all the parts and come out with what amounts to a new car that looks like something from the past. Even if the old components (of a radio) were the best obtainable when it was originally built many would have worn out or aged badly and they were often NOT the best available but those which met the economic necessity of competitive marketing. So, we replace virtually all capacitors, sometimes even the longer lived ones, and nearly all the resistors and often other components like transformers, speakers, dials, etc, etc. So, what do we have left that is original? Sometimes not much. Does the set work as it did when new? Maybe. Sometimes better because the new parts are better than the original ones were when new. With some luck the thing will look as it did, or at least close. If you had experience with something when it was new, and have a good memory, maybe you can tell where it stands viz its performance. My first short wave radio was a Hallicrafters S-38B, bought new after a lot of nagging. For a kid with no experience, it was magic. I still had its remains until recently. I do have an S-38 which one day I may rebuild/restore. In fact, the S-38B was a glorified AA-5. It worked quite well for what it was and was a good introduction. I am not sure I would have appreciated anything better at the time; too naive (means ignorant and inexperienced). Did not really know the difference between AM and CW then. Would have helped if someone had given me a Radio Amateur's Handbook but not sure how much of it I would have understood. I have currently an S-20R, which I rebuilt, would have run circles around the S-38B but I am not sure I would have recognized that. In any case, here we are restoring ancient stuff, some of which comprise old dreams. Sometimes what we drooled over in our teens turns out not to have been so wonderful (including some of the girls I lusted after) some of it was, indeed wonderful. Actually, my S.O. goes back to my late teens and IS wonderful. I would say that Hallicrafters fueled more dreams and lust than any other brand. Part of their success was to appeal to the dreamer in us and to make stuff that was not too far out of reach. An S-38B was attainable while a Collins anything was not really in the same universe. I see classic cars sometimes that don't quite look real; too perfect. They are shelf queens, if you drove one you might get a spot of dust on it; too bad, back to the shop to be cleaned and made perfect again. Not my taste. At least with radios I can make them so they are usable. No one must wear gloves to touch the knobs. Hallicrafters cared about appearance; a lot wound up as movie stars. They are still attention getters, and, unlike the movie queens of the past, still look the same. Hail Hallicrafters and what a wonderful hobby. On 6/17/2024 11:26 PM, Jim Whartenby via groups.io wrote:
--
Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: Hayseedhamfest
Richard Well said!? Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Monday, June 17, 2024 at 03:01:03 PM CDT, Richard Knoppow <1oldlens1@...> wrote:
Metal oxide film is not the same as carbon film or metal film. Any of these is superior to composition resistors. I have never found any authoritative source saying that composition resistors were superior in any way. Heat dissipation and lead size depend on the power dissipation of the resistor. If you have a problem with resistors running hot use larger resistors. Composition resistors will start drifting right away. The are never made in tolerances less than 5% because they can drift that much from the heat of soldering. Someplace like Mouser should be good for any type of film resistor but you will have to make your own list for most receivers. The handbook parts list is often a help. On 6/17/2024 11:16 AM, Tom Dailey wrote: Not sure if they STILL carry them, but bought BRAND NEW (not NOS) carbon -- Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: SR 150
A note: Collins took the side tone out of the 32V-3 as part of
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de-TVI ing it. The 1 and 2 versions had it. Evidently, it was a leakage path for RF they couldn't stop. In the past I mostly monitored my CW via my receiver but if you are working split frequencies you can't and a decent side tone is a necessity. Some of the old code practice oscillators, like the Bud, were arranged to also work as CW monitors. They needed only to sample the RF without a direct connection to the transmitter. On 3/29/2024 6:22 PM, waltcates wrote: *A lot of people complained about the sidetone issue, that is why the --
Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: SX-100 Repair Problems - Bumblebees!
Someone tightened all the loose screws. BTW, when did you last
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change your phono cartridge? On 3/29/2024 5:50 PM, don Root wrote: Here is a different Sprague ad --
Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: Hayseedhamfest
Jim, I was looking at data sheets for the ox etc from oh mite. I can't find anything about them being non-inductive.? Did I miss it? Bob W4JFA? On Mon, Jun 17, 2024, 8:36 PM James Chaggaris via <jimc=[email protected]> wrote: Greetings, |
Re: Hayseedhamfest
¿ªÔÆÌåÓýDave @ gives great customer service and the caps and resistors are of very good quality and reasonable priced IMHO. I have purchased hundreds of both from him over the last couple of years.
-------------------- Among God's creatures two,?the dog and the guitar,? have taken all the sizes and?all the shapes, in order? not to be separated from the?man. -- Andres Segovia ? Larry's Personal Email Amateur Radio: W6YH/AE larry@...? 209.736.9197 Angels Camp, California Earth-Planet, Universe |
Re: Hayseedhamfest
¿ªÔÆÌåÓýGood Evening, ? I will second the motion for Just Radios when looking for general resistor and capacitor kits.? Look at Dave¡¯s website and you will see that he even has them segregated in most used value by pre & post WWII.? I have been impressed with his kits.? Certainly beats spending hours perusing Digi-Key and or Mouser trying to build a BOM to order. I have also used Hayseed Hamfest for their can capacitors, even complete radio kits and they are nice as well.? So I would say those are my first 2 go-to places when sourcing caps and resistors for sprucing up old rigs.? ? After saying all that, the higher wattage resistors (>10W) you will have to go to Digi-Key or Mouser to source those. At least that has been my experience. ? Thank you, ? Mike W5CUL ? From: [email protected] <[email protected]> On Behalf Of James Chaggaris
Sent: Monday, June 17, 2024 7:36 PM To: [email protected] Subject: Re: [HallicraftersRadios] Hayseedhamfest ? Greetings, |
Re: Hayseedhamfest
Greetings,
I like using Ceramic Composition Resistors (OX/OY) series as they are non-inductive. ?Mouser sells Ohmite brand. As for Hayseed Hamfest, I've known Tom since he started offering cap kits and stand alone cans. ?I also helped him on a few occasions where he needed capacitor info for a particular radio. ?Tom will also supply caps for "One off" requests etc. ?I also had him build cap replacements for my SR2000 PS's.? Another great site If you're looking for capacitor and resistor kits is Just Radios. ? 73, Jim N9WW |
Re: Hayseedhamfest and resistor source
¿ªÔÆÌåÓý
You can get a resistor kit on amazon that contains every value you would ever need.? They are all spot on and high quality.? You can get a 1w kit and a 2w kit for 10 bucks each.? The new 2w are so small you can use them everywhere.
C From: [email protected] <[email protected]> on behalf of Richard Knoppow via groups.io <1oldlens1@...>
Sent: Monday, June 17, 2024 1:01 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Hayseedhamfest and resistor source ?
I've recently gotten caps and tubes from them, good outfit.
On 6/17/2024 11:19 AM, Michael via groups.io wrote: Greetings All. I¡¯ve used Hayseed Hamfest for Halli capacitor kits with-- Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: Hayseedhamfest
FWIW, I wasted some of my mis-spent youth working for a manufacturer of
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carbon and metal film resistors. Long ago. Carbon film resistors will run at red heat without damage except to the conformal coating. Metal film gives greatest stability and its possible to control the temperature co-efficient. We made zero TC resistors for NASA contractors. Carbon film is a standard for commercial use, these days for anything. The main change in manufacturing is the use of laser cutters to adjust and trim the coatings. We used carbide saws for carbon and diamond saws for metal film. As a result of the changes in method film resistors are now very cheap to make. That was the original virtue of composition resistors but no more. Composition resistors are made from a slurry of carbon particles in an insulating carrier. With time, and heat, the number of contacts between particles becomes less which makes the value go up and also increases noise. Composition resistors are noisy, the noise being in excess of the Johnson noise produced by any resistance. Metal film is the quietest with carbon film being somewhat greater than metal but still fairly quiet. On 6/17/2024 11:57 AM, don Root wrote: Hi tom, --
Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: Hayseedhamfest and resistor source
I've recently gotten caps and tubes from them, good outfit.
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On 6/17/2024 11:19 AM, Michael via groups.io wrote: Greetings All. I¡¯ve used Hayseed Hamfest for Halli capacitor kits with --
Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: Hayseedhamfest
Metal oxide film is not the same as carbon film or metal film. Any
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of these is superior to composition resistors. I have never found any authoritative source saying that composition resistors were superior in any way. Heat dissipation and lead size depend on the power dissipation of the resistor. If you have a problem with resistors running hot use larger resistors. Composition resistors will start drifting right away. The are never made in tolerances less than 5% because they can drift that much from the heat of soldering. Someplace like Mouser should be good for any type of film resistor but you will have to make your own list for most receivers. The handbook parts list is often a help. On 6/17/2024 11:16 AM, Tom Dailey wrote: Not sure if they STILL carry them, but bought BRAND NEW (not NOS) carbon -- Richard Knoppow Los Angeles WB6KBL SKCC 19998 |
Re: HT-44 driving An HT-45 and other single 3-400/3-500 amplifiers
Haven't tried it yet other than for testing.? It works just fine.? I might like the "T2" adjustment process better since it's a "set and forget" method.
50W output is more than enough if the band is in good shape.? When more power is needed, the "Boomer" can be easily switched in! -- 73/Rick W4XA __________________________________ All posts are created using OpenSuSE Leap 15.5 x64 Linux |
Re: Hayseedhamfest
¿ªÔÆÌåÓýHi tom, Re: ¡° ?I've learned that NOT ALL radios benefit from metal-oxide film resistors, such as made these days... smaller leads AND less heat dissipation capacity.¡±? ???? ¡°smaller leads¡± means thinner?, shorter?, both? It seems to me al newer resistors are physically much smaller so ?at the same current the surface must get hotter? as compared to old carbon comp ones. It is perhaps ok to run the resistor at high temps, but what about the cap right beside it or closely connected to it etc ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Tom Dailey
Sent: Monday, June 17, 2024 2:16 PM To: [email protected] Subject: Re: [HallicraftersRadios] Hayseedhamfest ? Not sure if they STILL carry them, but bought BRAND NEW (not NOS) carbon _._,_._,_ -- don??? va3drl |
Re: Hayseedhamfest and resistor source
Greetings All. I¡¯ve used Hayseed Hamfest for Halli capacitor kits with good results. However if you¡¯re looking for resistors try Antique Radio Supply a.k.a. Tubesandmore.com. They stock metallic film, carbon film as well as carbon composite. I¡¯ve used them many times for restoration parts and other hard-to-find hardware. Check them out¡
Mike R. |
Re: Hayseedhamfest
Not sure if they STILL carry them, but bought BRAND NEW (not NOS) carbon
composition resistors from MOUSER... Brand name began with a "K" (think it was KAMAYA)? Reasonably priced, I did 2 HRO-60s with 'em.? I've learned that NOT ALL radios benefit from metal-oxide film resistors, such as made these days... smaller leads AND less heat dissipation capacity. Tom |
Re: Hayseedhamfest
He wanted to contact Hayseed directly to see if they sold resistors - thus the request for his email/phone no.
AFAIK, he only sells capacitor kits for vintage tube radios. I've bought replacement resistors from standard sources (Amazon, Ebay, etc).
?
Bob K3AC
In a message dated 6/17/2024 1:14:51 PM Eastern Daylight Time, hottinger@... writes: ?
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