[FARC] Correction

[David Kindred]

Mark,

Thanks for the troubleshooting trips! I took the measurements you suggested
and it looks as if I'm getting near the measurements you predicted.  Will
all of the toroids disengaged, I get about 0.2 ohms measuring from input to
output. Engaging all of the toroids gets me 1 ohm resistance. Placing S7
into the tune position renders about 27 ohms resistance. I get 52 ohms
between the active and counterpoise connectors.

Herb,

Thanks for the soldering tips. A little touch-up might make all the
difference, and I appreciate your expert eye yesterday. Rolan is coming over
tomorrow, and I'm hoping he'll have some ideas, too. I'm wondering if the
problem is all operator error?

Thanks Rolan, Mark and Herb for your help on trying to figure this thing
out. You three are very fine examples of how generous hams are and I
appreciate each one of you!

73,

--David, K3PO

-----Original Message-----
From: farc-bounces at mailman.qth.net [mailto:farc-bounces at mailman.qth.net] On
Behalf Of m.e.whitmore at comcast.net
Sent: Tuesday, June 18, 2013 4:18 PM
To: Maryland ARC Frederick
Subject: [FARC] Correction

David,

The last step in my troubleshooting suggestions needs to be changed.

With S7 in the tune position you should now measure about 25 ohms since

R1 and R3 are essentially in parallel. The resistance of the 5 turns of

T1 is essentially zero.  Now move the VOM meter lead from the input

connector to ground and you should see the 51 ohms of R2.

Hopefully one of these measurements  will point to a problem that is

easily corrected.

73,
Mark
----- Original Message -----
From: "m e whitmore" <m.e.whitmore at comcast.net>
To: "Maryland ARC Frederick" <farc at mailman.qth.net>
Sent: Tuesday, June 18, 2013 3:19:38 PM
Subject: Re: [FARC] Help me debug my tuner kit?

David,

Here are some suggestions as why your tuner is not working.

1) One of the resistors R1, R2, R3 is open.  Not likely but possible.

2) One or more connections to the toroid inductors is open.  This is

   more likely. The wire on these inductors is enamel covered and sometimes

   it is hard to get a good connection if you don't get all of the enamel

   off.  If you have a Volt/Ohm meter, an easy check would be to measure

   the resistance from the input to the output of your SLT with S7 in the

   operate position. This should give a low reading of probably less than

   one ohm.  If you now switch S7 to the tune position, the reading should

   change to about 51 ohms.

I will bring a meter to field day next weekend in case you have not been
able

to get together with Rolan.

73,
Mark

----- Original Message -----
From: "David Kindred" <david at retroscape.com>
To: "Maryland ARC Frederick" <farc at mailman.qth.net>
Sent: Sunday, June 16, 2013 9:48:11 PM
Subject: [FARC] Help me debug my tuner kit?

Hi, guys,

I know you all are considerably smarter than I am, so I'd like to ask for
help. I just assembled a Hendricks SLT+ QRP tuner
(http://www.qrpkits.com/sltplus.html) and I must have done something wrong.
I'm not able to get a match on the antennas I've tried, even though they've
been cut per specification. The kit is fairly simple, which makes it all the
more embarrassing that I haven't gotten it to work. 

Would any of you knowledgeable folks be willing to take a look at it and
help me determine the problem? I was hoping to set up a QRP station for our
field day.

Much thanks and 73,

--David, K3PO

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