[HBR] Coil Q and the Boonton 260

[Peter Bertini]

Heck, I am a test equipment junkie... that's probably why I have five HP
141T spectrum
analyzers in the shop! LOL!  Actually, two are in for repair for another
ham.

Q's above 500 are hard to come by, unless you start using ferrite cores to
minimize resistive
loses.  Beyond that it is fun to try various dielectric material for the
coil forms.

But, heck, if you want to buy a piece of HP test gear for your Christmas
present, I would be all
for it!  I have two of the QM-1 Heathkit units, and a Boonton 190 VHF Q
Meter that I have
restored. I rarely use them, but I feel warm and fuzzy when I look at them!

BTW, the AADE LCR meter is a great tool!  I would lost without mine.

Pete

On Sun, Nov 30, 2014 at 2:14 PM, Brian Burns <brianburns1066 at gmail.com>
wrote:

> Hello Peter,
>
> ~ I would not recommend buying any vintage Q Meter that uses a
> thermocouple....
>
> ~ The Heath QM-1 Q Meters are fairly cheap,  but they are limited to
> measuring Q's of 250 on the 1X scale.  For comparative tests, they are
> probably quite usable for the coil forms used in the HBR series.
>
> ~ Peter  K1ZJH
>
> So come on guys! Help me buy myself a Christmas present! A bag of parts
> doesn't count---it has to be wrapped and put under the tree as a "thing".
> My
> XYL isn't going to know what it's for, in any case, but it needs to be
> recognizable as a "thing".
>
> I'm a sucker for test equipment, and would buy one of AADE's Mark IIB L/C
> meters, but he is closed up with some sort of serious illness. Anybody got
> one to sell?
>
> I looked up the specs on the QM-1, and it does have a 2X scale. I don't
> suppose it's very likely that we will be winding coils with Q's much higher
> than 250 anyway.
>
> In my Spanish guitar making, I test Q's of wood parts at audio frequencies,
> as a measure of their damping properties. So many things affect these
> numbers that I only use them as comparative quality measurements. I would
> imagine that the same would apply to electronic components.
>
> Cheers,
>
> Brian
>
>
>
>
>
> ---
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