carryaround 110v source - was Re: [HomeBrew] Grid-dip Meter Rebuild

[Jim Miller]

Have you considered a small portable 110v source?  Take one of the "cheap"
small inverters (400w or less for this) and put it in a bag with a small
gelcell for carryaround 110v.  Use a bag like the old bag phones.  Might
work quite well for relatively small current drain devices.  I have thought
about doing it but don't really need it very often and haven't gotten around
to it (yet).

73, de Jim KG0KP

----- Original Message ----- 
From: <N2EY at aol.com>
To: <n2lxm at juno.com>; <homebrew at mailman.qth.net>
Sent: Monday, March 21, 2005 7:31 PM
Subject: Re: [HomeBrew] Grid-dip Meter Rebuild


> ** Please do NOT cross-post messages when posting to HOMEBREW **
>
> In a message dated 3/21/05 4:58:32 PM Eastern Standard Time,
n2lxm at juno.com
> writes:
>
>
> > Dose any one have any thoughts on converting and old tube type Grid-Dip
> > meter to Solid State?.
>
> Yes.
>
> Don't.
>
> I have a Millen 90651 GDO that I purchased back in
> >
> > High School, it still works well and I use it often on the bench. But
now
> > with the weather turning warmer I want to be able to use my Millen
> > Antenna Bridge out side. And I am getting tired of pulling an AC
> > extension cord out every time I want to play with the antennas. I
> > purchased another 90651 from the " E " place, it has a bad power
> > transformer, but I knew that went I purchased it. My idea is to strip it
> > down, clean it up and rebuild it along the lines of the Millen 90652. I
> > have found plenty of information on the 90652, schematic and parts list.
> > It seems that the tuning capacitor is the same in all the Millen series.
> > Any thoughts and idea's will be welcomed.
>
> There was an article, I think in QST, about the development of the 90652.
> They had all sorts of headaches getting it to work right. They had to do
lots of
> tricks to get a good clean dip and eliminate dead spots.
>
> ---
>
> One trick I've used for small amounts of AC is to use an old UPS as an
> inverter. Usually they are tossed because either the battery has gone bad
or a new
> computer needed more capacity. If you're just powering a dipper or other
small
> test gear, they'll run quite a while.
>
> I also have a Heath vibrator supply that was meant for the Lunchbox rigs.
It
> uses a voltage doubler, and the transformer secondary is pretty close to
115
> volts. So I tapped the raw AC and ran it to a socket. Small amounts of 115
> wherever there's a car battery.
>
> 73 de Jim, N2EY
>
> 73 de Jim, N2EY
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