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Re: [Amps] Ameritron band switch repair

To: "Carl" <km1h@jeremy.mv.com>, "Vic K2VCO" <k2vco.vic@gmail.com>, <amps@contesting.com>
Subject: Re: [Amps] Ameritron band switch repair
From: "Jim W7RY" <w7ry@centurytel.net>
Reply-to: Jim W7RY <w7ry@centurytel.net>
Date: Tue, 5 Feb 2013 18:07:37 -0800
List-post: <amps@contesting.com">mailto:amps@contesting.com>
CAUTION! Buying a NEW D550, you will be disappointed. They are now rated much less that 240/335.
Be careful and look at the rating before you buy!

73
Jim W7RY


-----Original Message----- From: Carl
Sent: Monday, February 04, 2013 4:16 PM
To: Vic K2VCO ; amps@contesting.com
Subject: Re: [Amps] Ameritron band switch repair

Who said anything about a D550 for a bandswitch repair, that is serious
overkill, mine is 240/335W and is used for serious work like removing
components soldered to a big old steel chassis. Ive also hauled it up towers
in the winter (-;

The Weller 8200 at 100/140W with a good tip and tight nuts works fine. It is
some of the other brands that dont provide the same heat/watts. Ive picked
up a few extras of these on ham forums for $12-20 in good shape....beats
always looking for one!

Carl
KM1H




----- Original Message ----- From: "Vic K2VCO" <k2vco.vic@gmail.com>
To: <amps@contesting.com>
Sent: Monday, February 04, 2013 1:04 PM
Subject: Re: [Amps] Ameritron band switch repair


I bought a 100 watt Weller W100P temperature-controlled iron (not a gun) from a company that sells stuff to stained glass hobbyists. I have never been sorry. The thermal mass of the large tip makes soldering things like tank coil tubing and straps easy. It also does a good job on PL259's. It is much better for almost everything than a Weller D550 200/260 watt allegedly 'professional' gun. I don't think the guns are made with the quality that they once were (what is?).

On 2/3/2013 5:28 PM, Carl wrote:

----- Original Message ----- From: "George" <at6c@bellsouth.net>
To: <Amps@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

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--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/

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