Re: looking for parts polystyrene capacitors
Plenty of poly caps on AliExpress.? Looks like they are relatively expensive but good assortment of values. Jim WB4ILP?
On Mon, Apr 14, 2025, 1:29 AM Jim Pruitt WA7DUY via <jpruitt67= [email protected]> wrote:
Mike that page just shows you what the values
that were originally made.? If you go to Mike's order page you
will see that all he has is the 560pf which I THINK was part
number 23PS156.? The "S" indicates axial.? A "W" indicates
radial.? If you search Mouser "Film Capacitors" you will not see
Xicon listed but they were at least the last to make them and
Mouser does have ONE type in stock.? If you specifically search
for 23PW210 which is a 1000pf radial mount (I hate the axial mount
but that was all I used to be able to find). Anyway you will see
that they have 87 in stock. That link is:
1000pf 87 in stock
I recently placed an order with Mouser for some value and after a
month was told that they could find 4 (repeat FOUR) they could
ship (at $10 shipping for four capacitors weighing less than an
ounce!) and that the manufacturer (Xicon) had obsoleted their
polystyrene capacitors and would not be making any more so my
other 96 pieces got cancellled.
One ebay seller I recently bought some from was LF Components
Inc.? He lists only 3 values available and one is the 23PW210
radial mount:
and his other 2 listings are:
2200pf:
and 23PS110:
Not sure why the 100pf is more than double the price of the
others.? These are all lots of 100.? I had asked him if he had the
value that Mouser back ordered and then could not supply for me
and he said he did not have any and could not get any.? That
should tell you that they are disappearing.
I am not sure if that helps or not or if the information was
useful for others.
Good luck.
Jim Pruitt
WA7DUY
On 4/13/2025 11:12 AM, Mike N2MS via
wrote:
Try Kits and Parts:
Mike N2MS
On 04/13/2025 1:58 PM EDT Alan N8WQ via <oalanjones@...> wrote:
Gang,
Does anyone have a good source of polystyrene capacitors to point me to?
I need a 330pF cap for my current project, plus some spares :)
Thanks...
Alan, N8WQ
|
Re: looking for parts polystyrene capacitors
Mike that page just shows you what the values
that were originally made.? If you go to Mike's order page you
will see that all he has is the 560pf which I THINK was part
number 23PS156.? The "S" indicates axial.? A "W" indicates
radial.? If you search Mouser "Film Capacitors" you will not see
Xicon listed but they were at least the last to make them and
Mouser does have ONE type in stock.? If you specifically search
for 23PW210 which is a 1000pf radial mount (I hate the axial mount
but that was all I used to be able to find). Anyway you will see
that they have 87 in stock. That link is:
1000pf 87 in stock
I recently placed an order with Mouser for some value and after a
month was told that they could find 4 (repeat FOUR) they could
ship (at $10 shipping for four capacitors weighing less than an
ounce!) and that the manufacturer (Xicon) had obsoleted their
polystyrene capacitors and would not be making any more so my
other 96 pieces got cancellled.
One ebay seller I recently bought some from was LF Components
Inc.? He lists only 3 values available and one is the 23PW210
radial mount:
and his other 2 listings are:
2200pf:
and 23PS110:
Not sure why the 100pf is more than double the price of the
others.? These are all lots of 100.? I had asked him if he had the
value that Mouser back ordered and then could not supply for me
and he said he did not have any and could not get any.? That
should tell you that they are disappearing.
I am not sure if that helps or not or if the information was
useful for others.
Good luck.
Jim Pruitt
WA7DUY
On 4/13/2025 11:12 AM, Mike N2MS via
groups.io wrote:
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Show quoted text
Try Kits and Parts:
Mike N2MS
On 04/13/2025 1:58 PM EDT Alan N8WQ via groups.io <oalanjones@...> wrote:
Gang,
Does anyone have a good source of polystyrene capacitors to point me to?
I need a 330pF cap for my current project, plus some spares :)
Thanks...
Alan, N8WQ
|
Alan,
This is what Mouser has:
-200 PPM tempco, so should work fine where the older polystyrene
caps were used for VFO temperature compensation.
72/73,
Jim, K8IQY
On 4/13/2025 1:58 PM, Alan N8WQ via
groups.io wrote:
toggle quoted message
Show quoted text
Gang,
Does anyone have a good source of polystyrene capacitors to point
me to?
I need a 330pF cap for my current project, plus some spares :)
Thanks...
Alan, N8WQ
|
Mouser used to sell an assortment of PS capacitors. I just looked and polystyrene doesn't yield any results for capacitors now.
Jon AE7TE
Try Kits and Parts:
Mike N2MS
> On 04/13/2025 1:58 PM EDT Alan N8WQ via <oalanjones=[email protected]> wrote:
>
>?
> Gang,
> Does anyone have a good source of polystyrene capacitors to point me to?
> I need a 330pF cap for my current project, plus some spares :)
>
> Thanks...
>
> Alan, N8WQ
>
>
>
|
toggle quoted message
Show quoted text
Try Kits and Parts:
Mike N2MS
> On 04/13/2025 1:58 PM EDT Alan N8WQ via <oalanjones=[email protected]> wrote:
>
>?
> Gang,
> Does anyone have a good source of polystyrene capacitors to point me to?
> I need a 330pF cap for my current project, plus some spares :)
>
> Thanks...
>
> Alan, N8WQ
>
>
>
|
Try Kits and Parts:
Mike N2MS
toggle quoted message
Show quoted text
On 04/13/2025 1:58 PM EDT Alan N8WQ via groups.io <oalanjones@...> wrote:
Gang,
Does anyone have a good source of polystyrene capacitors to point me to?
I need a 330pF cap for my current project, plus some spares :)
Thanks...
Alan, N8WQ
|
Chuck and the Group,
It looks like I owe Jameco an apology.
I will be 70 years old on August 1st.
My short term memory must be taking a hit! :)
I received the parts on 3/28 which is excellent service from Jameco.
I misplaced the packing list that came with the Jameco parts and those parts intermingled with other parts on my work desk, lol.
Chuck I hope you get your missing parts!
73,
Alan, N8WQ
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On 4/13/25 11:47, chuck adams via groups.io wrote: Alan,
I feel for you bro.? I ordered some valuable parts that I
needed for projects from China before the tariffs kicked in.
Envelopes worth $5.99, $6.34, $10.25, ... have been sitting
at the airport and harbor in L.A.,CA for a week now and I
am guessing that I will never see them.? The backlog has
got to be several warehouses full by now.
The manpower alone has got be costing a lot more than the
revenue for the small stuff.
On 4/13/25 07:26, Alan N8WQ via groups.io wrote:
Gang,
Is anyone else having a delay in getting a shipment from Jameco?
I ordered parts on 3/25/25 and still have not received shipment.
Just curious...
73,
Alan, N8WQ
On 4/11/25 17:04, k6whp via groups.io wrote:
In keeping up with the mob, I had been buying my trimmers from JameCo. They are the ceramic ones and -- importantly -- a slot screwdriver fits and can turn the little buggers. (Done with the little brown plastic turdballs!)
At increments of 10, they are 99 cents and at 100 are 89 cents.
Be warned and be ready to order $20 of stuff otherwise they tap you for the difference.
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
|
I must take back my words on the Ozark Patrol not being an effective cw and ssb receiver. I discovered a couple videos demonstrating very nice receiving. Problem is due to my specific build, not the design. Now I think the amount of capacitive coupling from the antenna to the regen circuit impacts its performance. Yes now I recall reading this. In my build I substituted a 2 pF capacitor for the prescribed gimmick. Maybe good for AM signals but less capacitance may be good for cw and ssb. At least one builder advocates using a variable capacitor here, or perhaps if interest is solely ham signals a lower value capacitor may do well. While these regen circuits may have fewer parts they are not simple. And my point that one may wish to explore other circuits may still be in order.?
?
Useful OP reference is http://analogdial.com/Ozark/Ozark3.html.? actually all 4 pages, this has specific discussion on the capacitor in question. I imagine with the gimmick capacitor the type of wire insulation comes into play.?
?
Curt wb8yyy?
?
|
Gang,
Does anyone have a good source of polystyrene capacitors to point me to?
I need a 330pF cap for my current project, plus some spares :)
Thanks...
Alan, N8WQ
|
Alan,
I feel for you bro.? I ordered some valuable parts that I
needed for projects from China before the tariffs kicked in.
Envelopes worth $5.99, $6.34, $10.25, ... have been sitting
at the airport and harbor in L.A.,CA for a week now and I
am guessing that I will never see them.? The backlog has
got to be several warehouses full by now.
The manpower alone has got be costing a lot more than the
revenue for the small stuff.
toggle quoted message
Show quoted text
On 4/13/25 07:26, Alan N8WQ via groups.io wrote: Gang,
Is anyone else having a delay in getting a shipment from Jameco?
I ordered parts on 3/25/25 and still have not received shipment.
Just curious...
73,
Alan, N8WQ
On 4/11/25 17:04, k6whp via groups.io wrote:
In keeping up with the mob, I had been buying my trimmers from JameCo. They are the ceramic ones and -- importantly -- a slot screwdriver fits and can turn the little buggers. (Done with the little brown plastic turdballs!)
At increments of 10, they are 99 cents and at 100 are 89 cents.
Be warned and be ready to order $20 of stuff otherwise they tap you for the difference.
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
--
chuck adams, aa7fo
QRP WAS 17m started Apr 2, 2025
WAS-17 QRP --> TX,FL,SC,GA,OK,AR,KS,AL,AZ,MN
PA,CA,CO,WI,NE,ID,IL,NC,NY,AL
DXCC W,VE,JA,PY,ZL
|
Re: Honbay trimmers; I took one for the team
Gang,
Is anyone else having a delay in getting a shipment from Jameco?
I ordered parts on 3/25/25 and still have not received shipment.
Just curious...
73,
Alan, N8WQ
toggle quoted message
Show quoted text
On 4/11/25 17:04, k6whp via groups.io wrote: In keeping up with the mob, I had been buying my trimmers from JameCo. They are the ceramic ones and -- importantly -- a slot screwdriver fits and can turn the little buggers. (Done with the little brown plastic turdballs!)
At increments of 10, they are 99 cents and at 100 are 89 cents.
Be warned and be ready to order $20 of stuff otherwise they tap you for the difference.
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
|
Chuck,
Thank you so much for the OHR manuals. Having them available is a real find.
Hope your wife¡¯s foot heals quickly¡.. drive safe. You have a precious package. I am getting older and my wife is doing more driving. Then I can sit and enjoy the ride or watch videos on my phone¡ha!
Also while you were downloading to Google I found a very old series of emails about the OHR Spirit by a British ham. I looked him up and within a few hours he responded with the manual and the schematic for my friend in Florida. We are so blessed. Yes, the web has your life hidden somewhere but when used for good it is a miracle.
Again, thanks so much.
Dave K8WPE
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On Apr 12, 2025, at 3:19?PM, chuck adams via groups.io <chuck.adams.phd@...> wrote:
?Search for OHR, Oak Hills Research and QRP should do it.
Got the Spirit I manual uploaded. Rest of them coming
as we speak. For specific rigs you might try the
name of the rig. I'm trying to get all the meta words
in the description and I'll edit what I forget from time
to time as I catch it.
My wife has a fractured bone in her foot, so I'm aperiodic
on getting things done for the next six weeks or so. I'm
Uber Drive etc, so if I seem incompetent, it's because I
am.
thanks,
On 4/12/25 10:22, David Wilcox K8WPE via groups.io wrote:
Chuck,
What parameters should I use for Oak Hills Research manuals, schematics, etc?
Thank you for doing this favor for us.
Dave K8WPE
On Apr 12, 2025, at 12:37?PM, chuck adams via groups.io <chuck.adams.phd@...> wrote: ?Gang,
Doug DeMaw, W1FB, started Oak Hills Research way back in time.
Dick Witzke, KE8KL-W7DKU-K7NL <sk>, bought the company and produced
a large number of kits that we all probably have one of or more.
The most famous being the WM-1 and WM-2 QRP wattmeter.
Then Marshall M. in CO (missing info on my part) did some of the kits afterwards
until his passing.
I think I have all the manuals from all the kits I ever built scanned in.
I will start putting them on archive.org for preservation as long as possible.
After today, if anyone needs a manual, search there first. If you have manuals
that I don't have, then you should put them there. There is no reason for the
history to be lost. Too much has already. IMHO.
I'll post list when I'm done.
de amateur-historian at large,
--
chuck adams, aa7fo
QRP WAS 17m started Apr 2, 2025
WAS-17 QRP --> TX,FL,SC,GA,OK,AR,KS,AL,AZ,MN
PA,CA,CO,WI,NE,ID,IL,NC,NY,LA
DXCC W,VE,JA,PY,ZL
--
chuck adams, aa7fo
QRP WAS 17m started Apr 2, 2025
WAS-17 QRP --> TX,FL,SC,GA,OK,AR,KS,AL,AZ,MN
PA,CA,CO,WI,NE,ID,IL,NC,NY
DXCC W,VE,JA,PY
|
Re: Oak Hills Research (SP-1 manual)
I downloaded the SP-1, 20M manual just now. Thanks, Chuck!
Steve AA7U
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On 4/12/2025 9:20 AM, chuck adams via groups.io wrote: I have the manual scanned in for the 20m version that I built
back in the day.? File size is 1.7MB.
On 4/12/25 07:12, David Wilcox K8WPE via groups.io wrote:
Is there a specific groups.io site for Oak Hills Research transceivers?
A friend of mine has an OHR Spirit transceiver, and he is trying to find information about it, manual, and schematic.
Thank you.
Dave K8WPE
|
Re: Group Introduction: If you're going to post on the group, reply here!
Hi
Used to be more into VHF/ UHF microwave , but I have drifted down more into the HF region.?
Kevin ZL1UJG
|
Search for OHR, Oak Hills Research and QRP should do it.
Got the Spirit I manual uploaded.? Rest of them coming
as we speak.? For specific rigs you might try the
name of the rig.? I'm trying to get all the meta words
in the description and I'll edit what I forget from time
to time as I catch it.
My wife has a fractured bone in her foot, so I'm aperiodic
on getting things done for the next six weeks or so.? I'm
Uber Drive etc, so if I seem incompetent, it's because I
am.
thanks,
toggle quoted message
Show quoted text
On 4/12/25 10:22, David Wilcox K8WPE via groups.io wrote: Chuck,
What parameters should I use for Oak Hills Research manuals, schematics, etc?
Thank you for doing this favor for us.
Dave K8WPE
On Apr 12, 2025, at 12:37?PM, chuck adams via groups.io <chuck.adams.phd@...> wrote:
?Gang,
Doug DeMaw, W1FB, started Oak Hills Research way back in time.
Dick Witzke, KE8KL-W7DKU-K7NL <sk>, bought the company and produced
a large number of kits that we all probably have one of or more.
The most famous being the WM-1 and WM-2 QRP wattmeter.
Then Marshall M. in CO (missing info on my part) did some of the kits afterwards
until his passing.
I think I have all the manuals from all the kits I ever built scanned in.
I will start putting them on archive.org for preservation as long as possible.
After today, if anyone needs a manual, search there first. If you have manuals
that I don't have, then you should put them there. There is no reason for the
history to be lost. Too much has already. IMHO.
I'll post list when I'm done.
de amateur-historian at large,
--
chuck adams, aa7fo
QRP WAS 17m started Apr 2, 2025
WAS-17 QRP --> TX,FL,SC,GA,OK,AR,KS,AL,AZ,MN
PA,CA,CO,WI,NE,ID,IL,NC,NY,LA
DXCC W,VE,JA,PY,ZL
--
chuck adams, aa7fo
QRP WAS 17m started Apr 2, 2025
WAS-17 QRP --> TX,FL,SC,GA,OK,AR,KS,AL,AZ,MN
PA,CA,CO,WI,NE,ID,IL,NC,NY
DXCC W,VE,JA,PY
|
20 pf ceramic trimmer caps 40? each (qty 50) delivered from AliExpress
|
Re: BPF for DC receiver video
Hi,
I have a number of Kits and Parts dual BPF boards which show extra suckout at the opposing band on the filter response, so it is possible that the toroids are coupling at a low level.? However I could reduce (but not eliminate) the unwanted response somewhat by putting up a PCB 'wall' between the filters. Alternatively it could be the responses are coupling via the common earthplane. On of RF BPF filters that PA3AKE designed he had splits in the groundplane to reduce ground coupling effects, even on one filter board.?
?
|
Chuck,
What parameters should I use for Oak Hills Research manuals, schematics, etc?
Thank you for doing this favor for us.
Dave K8WPE
toggle quoted message
Show quoted text
On Apr 12, 2025, at 12:37?PM, chuck adams via groups.io <chuck.adams.phd@...> wrote:
?Gang,
Doug DeMaw, W1FB, started Oak Hills Research way back in time.
Dick Witzke, KE8KL-W7DKU-K7NL <sk>, bought the company and produced
a large number of kits that we all probably have one of or more.
The most famous being the WM-1 and WM-2 QRP wattmeter.
Then Marshall M. in CO (missing info on my part) did some of the kits afterwards
until his passing.
I think I have all the manuals from all the kits I ever built scanned in.
I will start putting them on archive.org for preservation as long as possible.
After today, if anyone needs a manual, search there first. If you have manuals
that I don't have, then you should put them there. There is no reason for the
history to be lost. Too much has already. IMHO.
I'll post list when I'm done.
de amateur-historian at large,
--
chuck adams, aa7fo
QRP WAS 17m started Apr 2, 2025
WAS-17 QRP --> TX,FL,SC,GA,OK,AR,KS,AL,AZ,MN
PA,CA,CO,WI,NE,ID,IL,NC,NY,LA
DXCC W,VE,JA,PY,ZL
|
Reprieve from tariff possible?
It appears that most of the chips, transistors, electronic parts are now exempt from the tariff.? Mostly I believe codes 8541 and 8542 affect us.
?
Updated april 11th.
?
?
|
Re: Honbay trimmers; I took one for the team
Yes, probably newly manufactured.? I did notice that Jameco says "more on the way".? I just wasn't sure if anyone is still making quality ceramic variable caps of any size.? So many things now are only available as cheap plastic. I always check Amazon for just about everything.? I'm usually surprised at what I can find and with Prime I always have free shipping. Jim WB4ILP?
New or NOS? Cannot say. I'm inclined to the former because Jameco publishes their stock count and claims new shipments arriving periodically.?
?
I have made purchases spanning a year or more and they're always available.
?
Oh, great news on the Amazon availability. That scotches Jameco's minimum purchase amount.?
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
|
Jim Kortge, K8IQY
Hal Dale
Alan N8WQ
David Wilcox K8WPE