[Yaesu] FL-2100B, Help Troubleshoot...

Sat May 19 00:41:50 EDT 2012

So, pretty much as suspected.
Now you have it working again I might recommend a look at PA0FRI's website http://www.pa0fri.com/ . He has some useful preventative measures aimed at safeguarding the somewhat squirrelly FL2100 amps. Note in particular the rerouted ground from VC1.
Cheers
Martin, HS0ZED
-----Original Message-----
From: yaesu-bounces at mailman.qth.net [mailto:yaesu-bounces at mailman.qth.net] On Behalf Of KBØNLY
Sent: 19 May 2012 10:14
To: geraldj at weather.net; yaesu at mailman.qth.net
Subject: Re: [Yaesu] FL-2100B, Help Troubleshoot...
Hmm, never thought of that, I just tore into it when I got it but now that I look back at the old switch it was the 10m contact that was damaged the worst! It was blown up when I got it, which is why I was able to get it so cheap, but now that I think about it I bet that is why. It melted the common contact off the old switch and burned a hole in the rotor.
73,
Scott KBØNLY
-----Original Message----- 
From: Dr. Gerald N. Johnson
Sent: Friday, May 18, 2012 9:20 PM
To: yaesu at mailman.qth.net
Subject: Re: [Yaesu] FL-2100B, Help Troubleshoot...
That may have been a major contributor to the demise of the bandswitch.
73, Jerry, K0CQ
On 5/18/2012 8:31 PM, KBØNLY wrote:
> Roger there is... Didn't think I would need to mention it since I 
> mentioned
> the SWR. Dug out my old Heathkit HM102 and put it inline, SWR is about
> 1.5:1 on 10m, a slight tweak of the coil and its flat now.
>> The problem was a bad solder joint on the tap at the tank coil, turns out
> when the amp was warmed up it got intermittent and it was driving me buggy
> finding it. As you could imagine, I would test it, nothing, let the amp
> cool and rest and walk away for a while and come back and start going
> through everything and it all looked good continuity wise through the 
> input
> and bandswitches, etc. But warm it up and I would get a blip or two of
> output and then nothing again! Talk about a hair puller. Then I decided 
> to
> get the chicken stick out, pull the plug and bleed everything off and 
> check
> continuity quick while it was still warmed up after being on the net and 
> low
> and behold its an open circuit on the output side! A little heat, solder,
> and its all better now.
>>> 73,
>> Scott KBØNLY
>>______________________________________________________________
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