[Yaesu] From CO8LY

Sat May 7 21:25:18 EDT 2016

Its easy to find ceramic capacitors with a wild temperature coefficient, 
the wire wouldn't change as much. CO8LY's original message said he 
changed on the capacitors.
73, Jerry, K0CQ
On 5/7/2016 6:58 PM, hwhall at compuserve.com wrote:
> Does it so und like he also replaced the coil ("reel" or "bobine") and
> that is what's getting hot? Is it possible the new coil's wire is too
> small? I don't have a FL2100B, so I'm not as well informed on the
> possibilities.
>> Wayne
> WB4OGM
>> -----Original Message-----
> From: Dr. Gerald N. Johnson <geraldj at netins.net>
> To: yaesu <yaesu at mailman.qth.net>
> Sent: Sat, May 7, 2016 5:48 pm
> Subject: Re: [Yaesu] From CO8LY
>> Your new capacitors sound like they are general purpose ceramics and
> aren't big enough to carry the RF current in the PA cathode and are very
> temperature sensitive. You need ceramic with temperature characteristic
> NPO and with a 3/4" or larger diameter with heavy wire leads to carry
> several amps of RF current.
>> 73, Jerry, K0CQ
>> On 5/7/2016 7:40 AM, co8ly wrote:
> > Dear friends
> > I have a Lineal Yaesu FL2100B that doesn't have the bands
> > of 30,17 and 12m.
> >
> > I have changed the entrance circuit for 15mtrs and him
> > transform for 17mtrs, change him the two condensers
> > and the reel says the diagram of the FL2100Z.
> >
> > All this well the SWR is of 1:2 in the entrance of 17mtrs but
> > when some minutes it passes the reel (bobine) (17mtrs) of entrance
> circuit
> > of it begins to heat and the SWR varies up to 1:4.
> >
> > I need to know because warms the reel of input of 17m of the
> > lineal ampl, in other bands doesn't happen.
> >
> > I wait ur opinion, a million thank you in advance.
> >
> > Best 73.- Eduardo CO8LY
> >
> >
> >
> >
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