You never want to tune an amp up for your ultimate desired output. It is
generally best to bring your power up in 3 or 4 steps. For example, if I
know that my ultimate drive power will be about 100 watts, I will first tune
up at about 25 watts, then 50 watts, then 75 watts, and finally 100 watts.
The steps aren't exactly critical, just as long as you bring your drive
power up in 3 or 4 steps. Waiting 10 or 15 seconds between steps is also a
good idea as you won't heat up the amp too quickly.
HTH
KD7GC
Alan R. Downing
Phoenix, AZ
-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Michael Thurman
Sent: Thursday, January 23, 2014 11:53 AM
To: [log in to unmask]
Subject: Re: W8JI's tuning suplement
stupid question since i do not own an amp, but what is the purpose of =
increasing power and then tuning more? is it to get a usable meter =
reading? I was always under the impression that tuned was tuned no =
matter the power because once tuned formeximum efficiency further =
retuning shouldn't be necessary. Everyoen here having amplifiers makes =
me think that if I win the lottery I might someday have one too
On Jan 23, 2014, at 11:44 AM, Mike Ryan <[log in to unmask]> wrote:
> Hi Steve:
>=20
> I've been reading through that info already including the tuning
> supplement.
> I think I'll use his A.M method but in CW mode. That is, preset the =
knobs
> to the initial start settings and band, set the exciters drive to 10 =
or 20
> watts, key down for no more than 5 2NDS, adjusting the plate for max =
power
> at that level, or pitch with the TW-1.
> Go back to stand by, setting the exciter up to about 60 watts, =
rekeying
> increasing the load and tweaking the plate, then just switch to SSB,
> reducing the drive to around 45W or so and just go ahead and operate.
> I don't like is actual CW tuning method of pre-setting the exciters =
drive
> at 80W prior too keying down, adjusting the plate and load controls.
> I'm no expert but that sounds like a good way to blow the crap our of
> things pretty quickly. LOL
>=20
> 73:
> Mike
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