Oh come on Carl....That`s the easy way out....Have you re-invented the
wheel? I could care less to copy your "work"...Jim K7RDX...
----- Original Message -----
From: "jeremy-ca" <km1h@jeremy.mv.com>
To: "k7rdx" <k7rdx@charter.net>; <amps@contesting.com>
Sent: Tuesday, September 25, 2007 8:53 AM
Subject: Re: [Amps] 6 mtrs:
> Of course not. If someone wants to "see" the circuit cough up the cash.
This
> is not a welfare office for freeloaders.
>
> Specs have been repeated many times on numerous reflectors for years. Go
> find them.
>
> Carl
> KM1H
>
>
>
>
> ----- Original Message -----
> From: "k7rdx" <k7rdx@charter.net>
> To: "Tom Rauch" <w8ji@contesting.com>; <amps@contesting.com>
> Sent: Tuesday, September 25, 2007 10:04 AM
> Subject: Re: [Amps] 6 mtrs:
>
>
> > Will the 6 meter guys publish some pics&specs for their work on the
web?I
> > want to see their work...No,I`m not interested in copying their
> > designs...All this "Discussion" deserves some real show&tell...Jim
K7RDX..
> > ----- Original Message -----
> > From: "Tom Rauch" <w8ji@contesting.com>
> > To: <amps@contesting.com>
> > Sent: Tuesday, September 25, 2007 5:06 AM
> > Subject: Re: [Amps] 6 mtrs:
> >
> >
> >> > On another note, Carl and I have seen many failed attempts
> >> > to SB-200
> >> > conversions to 6 meters and we have fixed them. Some
> >> > people who can't seem to get
> >> > it together with an Sb-200 conversion to 6 meters, cop out
> >> > and say it can't be
> >> > done or blame the tubes or some other lame excuses. Then
> >> > go on to try and
> >> > convince the masses that it is not a good item to buy. I
> >> > am sure Carl and I
> >> > can come up with hundreds of satisfied customers. Might I
> >> > add W2CQM to the
> >> > list.
> >>
> >> It could be you are doing enough wrong that it works, and
> >> they are doing so much right it doesn't work.
> >>
> >> That's what happens when we use a device in a region where
> >> it is unstable.
> >>
> >> The problem comes in when we inflate ourselves and be openly
> >> critical of others when we really succeeded through luck.
> >>
> >> Here is the test.....
> >>
> >> Take a pair of 572B's and put them in a near-perfect layout
> >> with very short grid leads, a very short anode path to the
> >> tank, and good shielding.
> >>
> >> Does it dip in the center of the RF power peak?
> >>
> >> Is it unconditionally stable for all tuning conditions?
> >>
> >> The answer above about 15MHz with the 572B in a pair is NO.
> >> As a matter of fact a well shielded design will oscillate if
> >> lightly loaded at full anode voltage. It will also NEVER
> >> have the output peak anywhere close to minimum anode
> >> current.
> >>
> >> Now if we go higher, especially in a much less than perfect
> >> layout, we can find frequency bands of stability. The
> >> problem is when we credit our accident to great skill and
> >> ability and heap tons of bad verbiage on others because they
> >> had what really amounts to bad luck, or we start saying the
> >> tube manufacturer is wrong.
> >>
> >> Rejoice in the fact you have found a good recipe, but let's
> >> not slam others who very likely could be just as
> >> knowledgeable or more knowledgeable than you or Carl. They
> >> just might not be as lucky as you two.
> >>
> >> 73 Tom
> >>
> >>
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> >
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> >
>
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