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.
toggle quoted message
Show quoted text
On 6/17/2024 11:16 AM, Tom Dailey wrote: 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
--
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
|
Hi 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 ? ? ?
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Show quoted text
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
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 -- 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.
|
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
|
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:
?
You can see all the offers on the website.
I have bought well over 30 capacitor sets myself. Installed without any problems so far.
?
Von: [email protected] <[email protected]> Im Auftrag von Robert Needleman via groups.io
Gesendet: Montag, 17. Juni 2024 17:21
An: [email protected]
Betreff: Re: [HallicraftersRadios] Hayseedhamfest
?
(he does not publish a phone no - probably does not want to deal with deluge of phone calls/messages. )
In a message dated 6/17/2024 8:40:17 AM Eastern Daylight Time, jpwatkins9@... writes:
I have already installed the cap kit, I think they used to have a resistor kit also.? Really trying for a phone number or email address to contact them.
?
On Sun, Jun 16, 2024 at 21:08 Jim Zellmer via <jimzellmer51=[email protected]> wrote:
Check out their?website:? ?
They have a kit for your S-20R.? The multi-cap can is a little pricey, by but the time you make on your own the price is not to bad.
?
On Sun, Jun 16, 2024 at 9:18?PM John Watkins via <jpwatkins9=[email protected]> wrote:
Finally getting around to my S-20R and was wondering if anyone knows if HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or email address for them.
?
?
?
?
|
Re: HT-44 driving An HT-45 and other single 3-400/3-500 amplifiers
Rick -? I detuned T2 to get the SSB power down to 50-60 watts to drive my pair of 3-500s (Tentec Centurion).? It sure would have been nice to have an ALC connection in the amp and HT-44 however.? With T2 detuned, I can still get nearly full output power (130-140 watts) on CW by just increasing the RF level control.? How's that attenuator working out for you?
73, Floyd - K8AC
|
You can see all the offers on the website.
https://hayseedhamfest.com/
I have bought well over 30 capacitor sets myself. Installed without any problems so far. ? Von: [email protected] <[email protected]> Im Auftrag von Robert Needleman via groups.io
Gesendet: Montag, 17. Juni 2024 17:21
An: [email protected]
Betreff: Re: [HallicraftersRadios] Hayseedhamfest ? (he does not publish a phone no - probably does not want to deal with deluge of phone calls/messages. )
In a message dated 6/17/2024 8:40:17 AM Eastern Daylight Time, jpwatkins9@... writes:
toggle quoted message
Show quoted text
I have already installed the cap kit, I think they used to have a resistor kit also.? Really trying for a phone number or email address to contact them. ? On Sun, Jun 16, 2024 at 21:08 Jim Zellmer via <jimzellmer51=[email protected]> wrote: Check out their?website:? ? They have a kit for your S-20R.? The multi-cap can is a little pricey, by but the time you make on your own the price is not to bad. ? On Sun, Jun 16, 2024 at 9:18?PM John Watkins via <jpwatkins9=[email protected]> wrote: Finally getting around to my S-20R and was wondering if anyone knows if HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or email address for them. ? ?
? ?
|
Here you go:
?
?
(he does not publish a phone no - probably does not want to deal with deluge of phone calls/messages. )
?
73,
Bob K3AC
In a message dated 6/17/2024 8:40:17 AM Eastern Daylight Time, jpwatkins9@... writes:
?
I have already installed the cap kit, I think they used to have a resistor kit also.? Really trying for a phone number or email address to contact them.
?
John WD5ENU
On Sun, Jun 16, 2024 at 21:08 Jim Zellmer via <jimzellmer51= [email protected]> wrote:
Check out their?website:? ?
?
They have a kit for your S-20R.? The multi-cap can is a little pricey, by but the time you make on your own the price is not to bad.
?
73
?
Jim Zellmer, KA0VSL
On Sun, Jun 16, 2024 at 9:18?PM John Watkins via <jpwatkins9= [email protected]> wrote: Finally getting around to my S-20R and was wondering if anyone knows if HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or email address for them.
?
Thanks,
John WD5ENU
?
?
?
?
|
toggle quoted message
Show quoted text
On Mon, Jun 17, 2024 at 12:11?AM Richard Knoppow via <1oldlens1= [email protected]> wrote: Don't see the pix although they are indicated. I am pretty sure
this list allows attachments.
On 6/16/2024 5:56 PM, Ronny Julian wrote:
If you can't see the pics attached it is an SX-100.? Thanks!
On Sun, Jun 16, 2024 at 7:29?PM Ronny Julian via
<> <k4rjjradio=[email protected]
<mailto:[email protected]>> wrote:
Let me start with a thanks for any advice.? I am greatly sight
impaired and would love to see this radio working again.? I'm trying
to get back to soldering but I've never worked on a tube rig
before.? I got this yesterday and have an Octal plug on the way from
Tubes n More.? I do not know much of the history on this.? Looking
for advice on getting it back up.? If anyone is in central FL or
nearby I'd like to talk to you about restoring it properly.? Pics
attached.? Thanks!
Ronny? W4TRI
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
|
I have already installed the cap kit, I think they used to have a resistor kit also.? Really trying for a phone number or email address to contact them.
John WD5ENU
On Sun, Jun 16, 2024 at 21:08 Jim Zellmer via <jimzellmer51= [email protected]> wrote: Check out their?website:? ?
They have a kit for your S-20R.? The multi-cap can is a little pricey, by but the time you make on your own the price is not to bad.
73
Jim Zellmer, KA0VSL
On Sun, Jun 16, 2024 at 9:18?PM John Watkins via <jpwatkins9= [email protected]> wrote: Finally getting around to my S-20R and was wondering if anyone knows if HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or email address for them.
Thanks, John WD5ENU
|
Most wires are reluctant to extend without damage.? In some situations you can replace a wire, but not with most transformers ?If ?Extend ?means add a terminal block perhaps, but I don¡¯t know. If ?Extend ?means add a ?midway splice perhaps, but I don¡¯t know if it will pass radio workmanship exam. Of course I might cheat too! ?I can¡¯t sleep. The robins are too noisy. ??don ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Richard Knoppow
Sent: Sunday, June 16, 2024 11:44 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] Hayseedhamfest? Wouldn't be simpler to just extend the wires that need it? A bit of
shrink tubing will insulate them at the joint. Rebuilding the new caps
sounds like a royal PITA.
On 6/16/2024 7:21 PM, Tom Dailey wrote: Caveat - The HS Hamfest cans DO NOT always align their bottom lugs like
the originals...? If the space is tight, it can be a royal PITA to
"stretch" wires.? I gave up and redo my own... cut 'em open with a
Dremel saw, carefully unwind the "rollup" cap material, and VERY
carefully pry the soft aluminum section-straps from the foil... After
matching your new caps to the old layout, use the barrel-crimp end of
some crimp-on connectors (cut off the rest and discard)... crimp "half"
the barrel on the aluminum strap (THIS gives you something to solder
onto!!), match up the lead arrangement and length, and after they're
together, using some REAL diuct tape (the FOIL type), put the top back
on and you're done, save for resoldering.? Note:? Mark the halves before
disassembly, so they fit well.
Tom - W?E _._,_._,_
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998 ? -- don??? va3drl
|
I have used sales@... before On Jun 16, 2024, at 9:03 PM, Richard Knoppow < 1oldlens1@...> wrote:
I had a look at their web site. I've done business with them in the past. I could not find any sign of an e-mail address. That is puzzling and not good. AFAIK they do not deal in resistors. You may have to make your own list but beware that the S-20R in the flesh may not be exactly as in the schematic. I had to replace several resistors in mine and replaced all the caps except for the mica caps. Hallicrafters did not use the best resistors available and the receivers are also getting very old, the last are about eighty years. I would go over all the resistors with a good ohm meter. Look for any which read higher than marked. Mostly you can read them in circuit. The read values should be equal or lower than marked since there may be other resistors in parallel with them, none should read higher than marked. Carbon comp resistors almost always go high. The caps are almost always all bad except for mica caps and some of those can be bad. My memory is that there is one low-inductance paper cap with woven flat leads. I have no idea who made these but a modern film capacitor will have better (lost a word I want but means unwanted) inductance properties than the specials did when new. Note also that Hallicrafters sometimes used resistors in parallel to get values they evidently could not get in a single resistor to keep production going. Lots of changes to get boxes out the back door. I think one or more of the antique radio suppliers sells kits of resistors but can't tell you exactly who. I should find out since there is no longer any walk in store in Los Angeles where this stuff is available. The restored S-20R will surprise you, its actually quite a good receiver. On 6/16/2024 6:18 PM, John Watkins wrote: Finally getting around to my S-20R and was wondering if anyone knows if
HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or
email address for them.
Thanks,
John WD5ENU -- Richard Knoppow Los Angeles WB6KBL SKCC 19998
-------------------- 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
|
Don't see the pix although they are indicated. I am pretty sure
this list allows attachments.
toggle quoted message
Show quoted text
On 6/16/2024 5:56 PM, Ronny Julian wrote: If you can't see the pics attached it is an SX-100.? Thanks!
On Sun, Jun 16, 2024 at 7:29?PM Ronny Julian via groups.io
<> <k4rjjradio@...
<mailto:[email protected]>> wrote:
Let me start with a thanks for any advice.? I am greatly sight
impaired and would love to see this radio working again.? I'm trying
to get back to soldering but I've never worked on a tube rig
before.? I got this yesterday and have an Octal plug on the way from
Tubes n More.? I do not know much of the history on this.? Looking
for advice on getting it back up.? If anyone is in central FL or
nearby I'd like to talk to you about restoring it properly.? Pics
attached.? Thanks!
Ronny? W4TRI
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
|
How badly impaired are you? Its important to whatever advice is
appropriate.
Two things about tube rigs: they are larger than solid state and
often need a larger, i.e. more massive, soldering iron, and the voltages
are higher. You need to be more aware of safety. While the danger of
getting killed is often exaggerated the danger of getting a painful
shock is quite real.
If you can read fairly easily look at books from before the 1960s
for general information on shop practice. The ARRL "Radio Amateur's
Handbook" usually has a good section on this and there were many other
handbooks aimed at hams. People did a lot more construction in the old
days and the techniques needed for repair and restoration are about the
same.
Good luck with finding someone not too far away, can't help with that.
toggle quoted message
Show quoted text
On 6/16/2024 4:08 PM, Ronny Julian wrote: Let me start with a thanks for any advice.? I am greatly sight impaired
and would love to see this radio working again.? I'm trying to get back
to soldering but I've never worked on a tube rig before.? I got this
yesterday and have an Octal plug on the way from Tubes n More.? I do not
know much of the history on this.? Looking for advice on getting it back
up.? If anyone is in central FL or nearby I'd like to talk to you about
restoring it properly.? Pics attached.? Thanks!
Ronny? W4TRI
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
|
I had a look at their web site. I've done business with them in the
past. I could not find any sign of an e-mail address. That is puzzling
and not good.
AFAIK they do not deal in resistors. You may have to make your own
list but beware that the S-20R in the flesh may not be exactly as in the
schematic. I had to replace several resistors in mine and replaced all
the caps except for the mica caps. Hallicrafters did not use the best
resistors available and the receivers are also getting very old, the
last are about eighty years. I would go over all the resistors with a
good ohm meter. Look for any which read higher than marked. Mostly you
can read them in circuit. The read values should be equal or lower than
marked since there may be other resistors in parallel with them, none
should read higher than marked. Carbon comp resistors almost always go
high. The caps are almost always all bad except for mica caps and some
of those can be bad.
My memory is that there is one low-inductance paper cap with woven
flat leads. I have no idea who made these but a modern film capacitor
will have better (lost a word I want but means unwanted) inductance
properties than the specials did when new. Note also that Hallicrafters
sometimes used resistors in parallel to get values they evidently could
not get in a single resistor to keep production going. Lots of changes
to get boxes out the back door.
I think one or more of the antique radio suppliers sells kits of
resistors but can't tell you exactly who. I should find out since there
is no longer any walk in store in Los Angeles where this stuff is
available.
The restored S-20R will surprise you, its actually quite a good
receiver.
toggle quoted message
Show quoted text
On 6/16/2024 6:18 PM, John Watkins wrote: Finally getting around to my S-20R and was wondering if anyone knows if
HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or
email address for them.
Thanks,
John WD5ENU
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
|
Wouldn't be simpler to just extend the wires that need it? A bit of
shrink tubing will insulate them at the joint. Rebuilding the new caps
sounds like a royal PITA.
toggle quoted message
Show quoted text
On 6/16/2024 7:21 PM, Tom Dailey wrote: Caveat - The HS Hamfest cans DO NOT always align their bottom lugs like
the originals...? If the space is tight, it can be a royal PITA to
"stretch" wires.? I gave up and redo my own... cut 'em open with a
Dremel saw, carefully unwind the "rollup" cap material, and VERY
carefully pry the soft aluminum section-straps from the foil... After
matching your new caps to the old layout, use the barrel-crimp end of
some crimp-on connectors (cut off the rest and discard)... crimp "half"
the barrel on the aluminum strap (THIS gives you something to solder
onto!!), match up the lead arrangement and length, and after they're
together, using some REAL diuct tape (the FOIL type), put the top back
on and you're done, save for resoldering.? Note:? Mark the halves before
disassembly, so they fit well.
Tom - W?E _._,_._,_
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
|
Ronny, By experience it works with jpg¡¯ s ?probably png¡¯s ???but ?not tif¡¯s? and whoNose I have never seen any info on what? file types work.? ?don ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Ronny Julian
Sent: Sunday, June 16, 2024 8:56 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] Advice on begining? If you can't see the pics attached it is an SX-100.? Thanks! ? -- don??? va3drl
|
Caveat - The HS Hamfest cans DO NOT always align their bottom lugs like
the originals...? If the space is tight, it can be a royal PITA to
"stretch" wires.? I gave up and redo my own... cut 'em open with a
Dremel saw, carefully unwind the "rollup" cap material, and VERY
carefully pry the soft aluminum section-straps from the foil... After
matching your new caps to the old layout, use the barrel-crimp end of
some crimp-on connectors (cut off the rest and discard)... crimp "half"
the barrel on the aluminum strap (THIS gives you something to solder
onto!!), match up the lead arrangement and length, and after they're
together, using some REAL diuct tape (the FOIL type), put the top back
on and you're done, save for resoldering.? Note:? Mark the halves before
disassembly, so they fit well.
Tom - W?E
|
Check out their?website:? ?
They have a kit for your S-20R.? The multi-cap can is a little pricey, by but the time you make on your own the price is not to bad.
73
Jim Zellmer, KA0VSL
On Sun, Jun 16, 2024 at 9:18?PM John Watkins via <jpwatkins9= [email protected]> wrote: Finally getting around to my S-20R and was wondering if anyone knows if HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or email address for them.
Thanks, John WD5ENU
|
Rick W7IMM
don Root
Floyd - K8AC