|[AMRadio] [Hallicrafters] [Boatanchors] Request for Most Common Capacitor Values to be Reproduced|
ka1kaq at gmail.com
Mon May 3 21:29:27 EDT 2010
Good input, Carl -
I don't think they can make disc caps. The hope is to have tubulars
made with axial leads and the foil end marked. My recollection is that
the right side of the printed label is the foil side, but it shouldn't
be difficult to add a paint band to the label screen. They would be
coated caps like an OD or such, not plastic wrapped. I'm guessing
Polyester or Polypropolene construction. It's been a while since I had
my mitts in such things, so the latter may not be produced anymore.
Once we get an idea of how receptive they are to producing these we
can move forward with adding other sizes and voltages.
On Mon, May 3, 2010 at 9:18 PM, Carl <km1h at jeremy.mv.com> wrote:
> I work on ham and vintage consumer radios and the .05 is very common.
> I prefer discs for the values up to .01 or even .05 depending on the
> voltage. Others may want all tubulars
> When working on a SX-28, SX-42, SX-62 the reduction in size makes a huge
> difference in neatness and ease of working. At times a 630V film is too big
> when the circuit voltage is under 100V which is why I asked for the 200V.
> More room, more airflow, less heat.
> National used a 1.0 uF @ 200V in a few radios. Actual voltage is a hair
> above zero.
> Ive seen very few communications/ham gear using a .5 but that and .2 is
> common in tube type auto radios in the 6V/12V input filtering. The auto
> radios are jam packed and you have to work thru layers of components at
> times. When Im finished every part has its own real estate, thanks to discs
> and compact films.
> I wont use parallel caps, it looks hokey and typical radio/TV service tech
> sloppiness of the 50-60's. I get a fair amount of that stuff in and its
> gross especially when there are several, plus series or parallel groups of
>> Hi Todd,
>> I agree with your values, tho' Carl's got a point on the .047. I don't
>> think it's as often needed (here) as the .47. Also, if size/price isn't
>> much different, only 600v would handle everything.
>> Al, W8UT
>> "There is nothing -- absolutely nothing -- half so much
>> worth doing as simply messing about in boats"
>> Ratty, to Mole
>>> The question is, what values would be the most handy to have supplied
>>> into the future for restoring old gear? Obviously we can't do a lot of
>>> oddball values as we're mainly looking for values that will sell well
>>> and be attractive from a production prospective. The few that popped
>>> to mind for me were:
>>> .1, .01, and .47 mfd at both 400 and 600 vdc. I also specified axial
>>> lead instead of the radial leads found on Orange drops since axial
>>> leads are better suited to our needs. I'm looking for other values
>>> that are likely to be encountered often enough to warrant production.
>>> Maybe 6-12 different values to choose from. These would be caps used
>>> for bypassing and such, not filtering. I suspect we could get them
>>> 'banded' for the foil side as well if folks feel that is important
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