Fw: [heathkit-yahoo] Heath HW-100 Plate Modulation Mod

[Bob Groh WA2CKY]

When all is said and done, I guess I would op for leaving the HW-
Doc,

When all is said and done, I guess I would op for leaving the HW-100 alone and just adding a linear amplifier. That should give you a couple of 100 watts of AM. No fuss, no modifications - just results. 

73
Bob, WA2CKY

----- Original Message ----
From: kd4e <doc at KD4E.COM>
To: HEATH at LISTSERV.TEMPE.GOV
Sent: Wednesday, August 22, 2007 2:18:38 PM
Subject: Re: [HEATH-TEMPE] Fw: [heathkit-yahoo] Heath HW-100 Plate Modulation Mod

I cannot contemplate a project of that magnitude right now.

I own the HW-100 and the outboard modulator.

I'd like my mods to the HW-100 to be reversable (other than
merely beefed-up components) so will look at relays to select
between AB and C Class and other mode-relevant changes.

100W of high-level plate modulation is an important project
parameter - I remain unpersuaded that 25 or even 100W of
less-than-high-level AM will cut it on noisy bands and across
long distances except when propagation is excellent and my
antennas are optimized.

>> If you really want an education, build a nice final and modulator,  
>> The HW would make an excellent exciter for a 4-400, 4-250, or even a 
>> pair of 811s. If you keep the power down to about 500W, a pair of 811s 
>> would do the modulation.  It would be a lot of work and an education, 
>> but fun too. Most of the components are available and cheap, if you 
>> know how to scrounge, except for the mod trans.  Once people know you 
>> are serious, things start to come out of basements and attics, since 
>> there is virtually no real demand for the stuff anymore.  Hamfests are 
>> great sources too.
>>
>> If you use plug in coils, or confine yourself to one band, the RFpart  
>> is very simple.
>> Wilson
>> W4BOH


-- 

Thanks! & 73, doc, KD4E
Personal: http://bibleseven.com/kd4e.html

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