On Sun, 13 Sep 1998 16:07:56 Scott Townley <nx7u@primenet.com> writes:
>
>I have an older Motorola-made amplifier that uses a pair of HK-254
>tubes in
>push-pull, evidently an old low-band VHF jobber as it tunes up on 6m
>quite
>nicely.
>Looking in an old Radio Handbook (10th ed.) it looks that the HK-254
>and
>100TH are quite similiar in "typical" performance. Does anyone have
>any
>experience with the HK-254? Was it indeed the HK "response" to the
>100TH
>(or maybe the other way around)? Are they similiar enough that I
>could use
>100TH data with the -254 and expect similiar results?
The 254 is midway between the 100TH and TL and has an amp factor of 25.
I dont think you would be very happy with that tube on SSB.
I had a HF AM amp that ran a pair of HK354C's which were pretty much
identical to the Eimac 152TL or a 100TL with a 150W plate.
Ran fine with a Viking 1 for a driver.
H&K, BTW, drove Eimac nuts with their technical ability...until Eimac
screwed them with a bunch of frivilous lawsuits.
For cheap 6M power try a pair of 572B's .....700-800W out with 100W of
drive.
73 Carl KM1H
>Anyone have a copy of either tubes' data sheet (w/ constant current
>curves,
>for example) they'd copy for me?
>
>Eventually you will hear me on 6m!!!
>
>Thanks in advance,
>------------
>Scott Townley
>nx7u@primenet.com
>------------
>Collector of:
> Stoddard Aircraft EMI/RFI receivers and accessories
> Big Parts for that Big Linear Amp
> 70's era RF test equipment HP/GR/Tek
> Radio-related technical reference material 1940+
> ...anything else that will keep me off the streets at night
>
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>
>
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