[Yaesu] From CO8LY

[Dr. Gerald N. Johnson]

I should have typed "changed ONLY the capacitors."

73, Jerry, K0CQ

On 5/7/2016 8:25 PM, Dr. Gerald N. Johnson wrote:
> 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 only 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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