At 07:07 PM 3/15/04 -0500, you wrote:
> > Come on now guys.....show me a bloke who tuned his FIRST set of cavities
> > with a QRP tx, a long bit of coax, a tunable rx with a vhf converter, and
>a
> > second hand scope and I will show you some who could end up as a real
> > engineer, understanding what he is doing.
> > Remember...the Titanic was built by professionals, Noah was an amateur.
> > ----- Original Message -----
> > From: "ac0y5" <[EMAIL PROTECTED]>
>
>I did not do it exectally that way but did use a $ 40 hamfest signal
>generator to tune a couple of sets. Also to measuer the deviation of
>transmitters I had a GLB synsither hooked to a HR 2 Regency and an a DC
>scope hooked to the discriminator of a scanner. By going 5khz plus and
>minus with the GLB and marking the scope it made a good deviation monitor.
>
>While it does take a lot more time it is not hard to tune a duplexer or any
>of the older gear with minimum equipment. People would laugh if they saw
>where I took some small wire twisted together for an inch or so and used
>that as a capacitor to tune the RF stages of a Twin V to get it to 2 meters.
FYI my dad showed me a trick back in the mid 60s... he said that he
learned it in the late 50s from a engineer at Cal Tech...
Take a coffee stirrer that is a double plastic tube about 4 to 5 inches
long....
stuff a piece of #22 insulated wire into each tube (it fits nice and snug)
and you can figure roughly 1 to 2pf per inch... depends on the insulation
and upon the plastic in the stirrer. The neat part is that you can trim it
with a pair of diagonal cutters. Once you get the value you want just
put a blob of RTV or of JB-Weld over the exposed end.
Mike WA6ILQ
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