[Yaesu] FL-2100 BandSwitch Needed...

[Dr. Gerald N. Johnson]

I've not been in or used a FL2100. I did some searching on the phrase 
yaesu fl2100 bandswitch. There is mention of a known occasional 
parasitic oscillation that because its not loaded generates high voltage 
across the bandswitch. Apparantly its a common enough FL2100 problem 
leading that repairs have used the supply of original replacement 
switches so it will take some cobbling to install any replacement. And 
suggests a more effective parasitic suppressor needs to be installed. 
When Surplus Sales wants over $100 for some sturdy switches, it may be 
most practical to make it a single band amp.

Gerald J.

On 4/29/2012 11:16 AM, KBØNLY wrote:
> I think one of two things happened to this amp... Either they switched with
> drive applied or they applied too much drive when it was out of tune.  I
> know the precautions on these, the previous owner obviously did not.
>
> I will have to start looking at the various sources and see if I can
> retrofit a new switch but it won't be easy.
>
> 73,
>
> Scott KBØNLY
>
>
> -----Original Message-----
> From: Dr. Gerald N. Johnson
> Sent: Sunday, April 29, 2012 9:37 AM
> To: yaesu at mailman.qth.net
> Subject: Re: [Yaesu] FL-2100 BandSwitch Needed...
>
> The key to longevity is being sturdy enough and then never switching
> with RF applied. Probably 5 KV and 15 or 20 amps is adequate which rules
> out the most common switch sizes.
>
> RF Parts and Surplus Sales of Nebraska come to mind (along with Yaesu)
> as sources. There's a slight chance Mouser or Digi-Key may have a sturdy
> enough switch, but its less likely. Mounting and fitting inside the case
> can be an issue with the sturdier switch because it takes large air gaps
> to achieve a greater voltage rating and that has to make the switch larger.
>
> 73, Jerry, K0CQ
>
> On 4/29/2012 12:53 AM, KBØNLY wrote:
>> Anyone have a source for one?  I got a 2100 that is in good shape other
>> than a bad band switch, and I probably have another one coming from a
>> friend who bought one with a bad switch as well.  I might convert that one
>> to 6m for him so the switch isn’t an issue, wish I could rob contacts from
>> his switch wafers to make one good switch but someone tried to fix that
>> one and busted it all to heck and its just a mess but I will see what I
>> can salvage.
>>
>> This one the 80m contact is vaporized and the wiper is nearly gone.  Went
>> through it, everything else looks good minus one cap, so I need a switch
>> to start the rebuild!
>>
>>
>> 73,
>>
>> Scott KBØNLY
>>
>>
>>
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