Replacing the speaker in a S-20 R
I know I have asked about this before, but lost the return email.? I have an 8 Ohm 5 inch 20 watt speaker and an audio transformer, primary is 500, 1500, 2000, and 3000 Ohms.? Secondary is 4,8,and 16 Ohms.? What should I replace the speaker field coil with, or just leave it as is?
Thanks,
John WD5ENU
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WOW!? Thanks- there is some really neat stuff there!
73
George Deitz KN3PAT
On Monday, June 24, 2024 at 07:48:31 PM EDT, dwight_talley <dwight_talley@...> wrote:
Do a search on eBay for Steampunk electronics and you will see several vendors selling meters and other electronics. You may find good deals on stuff they have no clue about.?
Dwight
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Do a search on eBay for Steampunk electronics and you will see several vendors selling meters and other electronics. You may find good deals on stuff they have no clue about.?
Dwight
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Where did you find Steampunk radio stuff at? Thanks-
George-KN3PAT
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I needed to replace my meter when I got my R-274.? Steampunk people were selling this meter on eBay, and I snapped it up.? They don't know what they were selling, and I got a good price for it. I cleaned it up, which it really needed, and it now works in my radio. Much better than the broken meter that was in the R-274 when I picked it up.?
Dwight
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I have made several in the past,, it is a simpson model 126, I believe, and you can take the movement from several different simpson models and put into the housing , then swap the neter face, and your good to go,, I think the internal resistance of the original was 1180 ohms... Hope this helps...WV8KU
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You¡¯re welcome glad I could help .
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On Jun 23, 2024, at 9:58 PM, Tom Smith <n5ama@...> wrote:
?Paul, thanks so much for the offer! I got a scan from Dave and that should do the trick.
Have a great week,
Tom N5AMA
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Re: SX-117 noise limiter behavior
Mine is remarkably stable.? It drifts a few Hz in the first few minutes, but nothing noticeable after that.? I wasn't able to find the original diodes anywhere in the USA - there were a couple on eBay at a stiff price.? So, I used the 1N459A which was recommended as a suitable replacement by someone on the forum a long time ago.
73, Floyd
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Paul, thanks so much for the offer! I got a scan from Dave and that should do the trick.
Have a great week,
Tom N5AMA
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Dave, thanks so much for taking the time to scan the dial and forward it to me!!
Have a great week.
Tom N5AMA
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Hi Tom , Here's a scan of the dial .
Dave KB6MBC
I'm looking for a replacement meter for the sx-73 (R-274) receiver. The receiver currently has a non-original Phaeton meter that has some sort of level set dial.
The original meter looks like a Simpson or Weston 50ua carrier level meter with the vertical bars in the lower part of the case front. It's likely this meter is made from
unobtanium, so I'll probably have to locate a 50ua meter of the proper case diameter and redo the dial for a decent match. A closeup cell phone shot of this dial would?
be helpful.
Any help greatly appreciated.
Thanks,
Tom N5AMA?
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Tom ?I can send you a pic of my R-274 meter. Email me direct, I can maybe do more on this. Paul? N6FEG
I'm looking for a replacement meter for the sx-73 (R-274) receiver. The receiver currently has a non-original Phaeton meter that has some sort of level set dial.
The original meter looks like a Simpson or Weston 50ua carrier level meter with the vertical bars in the lower part of the case front. It's likely this meter is made from
unobtanium, so I'll probably have to locate a 50ua meter of the proper case diameter and redo the dial for a decent match. A closeup cell phone shot of this dial would?
be helpful.
Any help greatly appreciated.
Thanks,
Tom N5AMA?
|
I'm looking for a replacement meter for the sx-73 (R-274) receiver. The receiver currently has a non-original Phaeton meter that has some sort of level set dial.
The original meter looks like a Simpson or Weston 50ua carrier level meter with the vertical bars in the lower part of the case front. It's likely this meter is made from
unobtanium, so I'll probably have to locate a 50ua meter of the proper case diameter and redo the dial for a decent match. A closeup cell phone shot of this dial would?
be helpful.
Any help greatly appreciated.
Thanks,
Tom N5AMA?
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Re: SX-117 noise limiter behavior
Hi Floyd,
My neighbor has an electric fence which gives regular pops when listening to 40M. The NB reduces those quite a bit, but not completely. Now that you mention it, I might try replacing the diodes anyway, and see if it works any better.
The VFO on mine drifts quite a bit, even after nearly half an hour. How stable is yours?
Cheers,
Peter - VK2AN
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Re: SX-117 noise limiter behavior
Hi Peter.? Nice to hear from someone who has an SX-117.? Yes, mine had a problem with one of the diodes in the circuit - it wasn't shorted, but had a resistance of around 60 ohms in each direction.? After replacing the diodes, it appears to be working.? At this time, I have no noise here so can't comment on the effectiveness.? Now when I turn the NL on, strong CW signals (S9 + 20 dB) drop in level maybe 3-5 dB according to the S-Meter.? I don't hear any artifacts often associated with turning on a noise limiter in the presence of strong signals close in frequency.
73, Floyd - K8AC
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Re: SX-117 noise limiter behavior
It seems to me that no-one has actually answered your question.
I have an SX117 and the NB certainly doesn't reduce the signal to S1. It causes a very slight drop in audio on AM but almost no noticeable decrease on SSB. It does seem to be somewhat effective on pulse type noise, but not as effective as the modern ones.
I suspect yours has a fault.
Cheers,
Peter - VK2AN
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Re: SX100 DC power plug question
A short piece of solid electrical wire can be stripped at both ends and plugged in [carefully to the correct? pins]. maybe you need #12, or 10 ? to fit snugly. With two pairs of good pliers, you should be able to make it like a staple.Then leave it there ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Richard Knoppow
Sent: Tuesday, June 18, 2024 11:10 AM
To: [email protected]
Subject: Re: [HallicraftersRadios] SX100 DC power plug question? Its safe. If you are concerned with accidental contact with the
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:
If a DC power plug is not available for the back of one of the SX series
radios, is it safe to bridge across the terminals inside the radio?
Think its pin 6 & 7 but dont remember for sure.
Or a suggestion on where I may find one of these?
Imagine they may be getting difficult to locate.
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998 ?
-- don??? va3drl
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Another great site If you're looking for capacitor and resistor kits is Just Radios. ?
I also find Dave and Just Radios a good place to buy resistors and capacitors. I've used them frequently. Bob, AF6C
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Re: SX100 DC power plug question
Its safe. If you are concerned with accidental contact with the
socket you can put a piece of tape across it. Or, simply unwire the
socket and link the necessary wires internally.
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On 3/30/2024 6:49 AM, Keith wrote:
If a DC power plug is not available for the back of one of the SX series
radios, is it safe to bridge across the terminals inside the radio?
Think its pin 6 & 7 but dont remember for sure.
Or a suggestion on where I may find one of these?
Imagine they may be getting difficult to locate.
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
|
My S-38E, acquired new in 1957, was a huge improvement over one tube
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
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On 6/18/24 05:12, Bob wrote: 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 groups.io
<> <1oldlens1@...
<mailto:[email protected]>> wrote:
Thank you for the compliment (I collect them).
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:
On Monday, June 17, 2024 at 03:01:03 PM CDT, Richard Knoppow
\
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
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Floyd - K8AC
Peter E
don Root