Re: Using Vacuum Tube heathkit as Linear Amplifier for QRP
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Fantastic! part of the magic of ham radio is experimenting and developing more personal knowledge of radio and electronics.
In the 80s I built boots for an Ten Tec Argonaut 509 using the carcass
of a Heathkit DX-35. There is no receive circuitry involved. I biased
the single 6146 for class AB1 operation. I built a solid state T-R
antenna switch to keep the QSK feature of the 509. It served me for a
several years and then the 509 moved to a new home. The remains of the
DX-35 also went to another ham.
I have the CW portion of a Heathkit DX-100 down for overhaul. The AM
phone parts were all gone when I got the DX-100. I am going to dpo the
mods to include the linear operation in phone mode to amplify SSB
signals and keep the class C operation for it's CW operation - ala the
Apache (TX-1). Grid block keying has already been part of this
Sometimes QRP is just not enough.
On 11/10/19 7:35 AM, Don Richards wrote:
> Hi Gordon
> I ran across this a while back but never tried it.
> 73 Donve3ids
bark less - wag more
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