DX-100 Resistor Source

[Michael Waldrop]

I, myself, would not use a metal film resistor as a parasitic surpressor.
I would stick with carbon. All the research I have done on metal
film resistors states the construction consist of a metal film wrapped
around a form and covered with an outer covering. That, to me, is a coil
and using them in an RF circuit such as a parasitic surpressor is, in my
opinion, not a good idea. There may be others who disagree and that's
fine. However, I'll stick with carbon resistors for RF application.

I have experienced the same responses you did, not necessarily from
manufacturers but electronic firm sales and help desk people. They
simply are not trained or have the knowledge to answer such questions.
If the answer is not readily available in their data base of answers,
more often then not, they give wrong answers. It's a shame but that's
the way things are these days. I learned not to ask those questions.
Instead I look it up in a good reference book instead. It's safer and
more reliable... :)

73's
Mike
W5RKL

On Wed, 24 Jan 2007 11:29:25 -0500, Tom Chesek <tchesek at EPIX.NET> wrote:

>I have a related DX-100 (plus all other transmitters/amplifiers of similar
>design) question regarding the parasitic suppressor on the final output
>plates. These suppressors were carbon resistors with a coil wrapped around
>them. How critical is the resistance of these resistors and what about
>replacements? I've been told previously that only carbon will do since
metal
>film can have an inductive effect, but when I posed that question to a
>resistor manufacturer their response was that their products could be used
>anywhere the carbon resistors were used.
>
>Tom K3TVC
>
>
>----- Original Message -----
>From: "Charles W. Morehouse" <w4gbw at BELLSOUTH.NET>
>To: <HEATH at LISTSERV.TEMPE.GOV>
>Sent: Tuesday, January 23, 2007 10:35 PM
>Subject: Re: [HEATH-TEMPE] DX-100 Resistor Source
>
>
>> Mike,
>> Mouser has them if you use a combination.  In the case of the .092. a
>> .091 and a .001 in series.
>> They have a 5.42 but no 5.4.  Again you could use a combo.  Luck, 73.
>> Wayne,
>> W4GBW
>> Mike wrote:
>>
>> >Does anyone know where to buy replacements for the 5.4 and .092 ohm
>> >resistors that are used as meter shunts?
>> >
>> >Mike VE7MMH
>
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