[Amps] Henry RF generators

[Joe Subich, W4TV]

Heath Robinson is the British Rube Goldberg (or vice versa).
<https://en.wikipedia.org/wiki/W._Heath_Robinson>

73,

    ... Joe, W4TV


On 2020-12-15 6:44 PM, Mark - N5OT wrote:
> Wait.
> 
> Who is Heath Robinson?
> 
> Famous kit maker?
> 
> Inquiring minds want to know.
> 
> 73 - Mark N5OT
> 
> 
> On 12/15/2020 5:34 PM, Chris Wilson wrote:
>>
>>    15/12/2020 23:23
>>
>> Many Henry RF generators on 27 or 14 MHz use a brass (?) slug within a 
>> copper tube coil for inductance changing (as the turns counter 
>> advances the slug within the coil the inductance reduces) and a rather 
>> Heath Robinson variable capacitor using two brass  plates, with a 
>> Teflon insulation sheet between them. Now I realize they were not 
>> intended to be frequency agile, so my question is, is there an 
>> advantage to changing the strange looking variable cap for a vacuum 
>> variable? Is the consensus of opinion that slug tuning the inductor is 
>> fine and can be left as is? Thanks.
>>
>> An example Henry RF deck is at http://www.chriswilson.tv/deck.jpg
>>
> 
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