[Amps] Ameritron band switch repair

[Carl]

----- Original Message ----- 
From: "George" <at6c at bellsouth.net>
To: <Amps at contesting.com>
Sent: Sunday, February 03, 2013 5:07 PM
Subject: [Amps] Ameritron band switch repair


>A friend bought a used AL 1500 (from about 1999) and when we opened it 
> up to install the transformer we noticed that one of the straps from the 
> coil to the band switch was not connected to the band switch.  The 
> solder that was there was globed up and did not flow out properly.  I 
> thought it would be an easy repair to just re-heat the joint and flow 
> the solder.  Turned out that the solder would not flow out with the heat 
> from a 100w gun.  The excess solder would not melt into the existing 
> solder on the band switch or on the strap.  I tried adding a little more 
> rosin core solder but still the same problem, no solder flow.  Did 
> Ameritron use something besides 60/40 rosin core solder on the band 
> switch?  Looks like I will have to remove all the solder down to bare 
> metal and clean the lug on the switch in order to re-solder this 
> connection.  The strap shouldn't be problem to clean but the lug on the 
> band switch is very thin and I hate to work on it too much with a file.

Get a real gun, at least 200W and dont Mickey Mouse around with a file.


> 
> There is a green wire coming out of the input circuit enclosure and it 
> looks like it was solder to a lug near the band switch but is now just 
> hanging there.  Was this there to ground out the 10M input circuit to 
> comply with FCC rules?

Yes.

Carl
KM1H


> 
> 73,
> George
> W2GS
>