[Amps] Henry RF generators

[Bill Steffey NY9H]

i had a GREAT salesman working for me in the 80s.....

his name was Tom Barr....     his sister  was  Candy 
Barr....              sounds like the kind of stripper Tom would enjoy...


bill


On 12/15/2020 11:24 PM, Jay Sturtevant wrote:
> Chris,
>
> Sorry, but I had a physics class lab partner many years ago named Chris
> Wilson. Chris was a genius, I was not!
> He frequently referred yo my set-up of the experiments as a Heath Robinson!
> He helped me the entire year!
>
> Jay, K2ZT
>
> On Tue, Dec 15, 2020, 8:07 PM Chris Wilson <chris at chriswilson.tv> wrote:
>
>>
>> Hello Amps,
>>
>>   Wednesday, December 16, 2020
>>
>>   Oops, forgot the link to the 3000D 14 MHz deck , sorry. See below please.
>>
>> http://www.chriswilson.tv/deck2.jpg
>>
>>
>> Best regards,
>>   Chris    2E0ILY       mailto:chris at chriswilson.tv
>>
>>
>>
>>
>> CW> Hello  Joe,
>>
>> CW>  Wednesday, December 16, 2020
>>
>> CW>  Yes, here in the UK we say Heath Robinson to describe something
>> CW> that is cheaply made, shoddy or sometimes obviously home made. It
>> CW> is not usually used as an offensive description, but more with
>> CW> affection for something amusingly eccentric.
>>
>> CW> Here's another Henry deck, no tunable inductor, but two "Heath
>> CW> Robinson" variable caps ;) This is a 14 MHz deck, the previous a
>> CW> 27 MHz. There were seemingly several variants, some DID use a vac
>> CW> variable, but I have only seen photos of those. the 27 MHz deck is
>> CW> a 2000D, the 14 MHz one a 3000D.
>>
>> CW> Jay, unless you went to school here in the UK, in Cheadle, Cheshire,
>> or in Manchester, no.
>>
>>
>> CW> Best regards,
>> CW>  Chris    2E0ILY       mailto:chris at chriswilson.tv
>>
>>
>>
>> JSW>> Heath Robinson is the British Rube Goldberg (or vice versa).
>> JSW>> <https://en.wikipedia.org/wiki/W._Heath_Robinson>
>>
>> JSW>> 73,
>>
>> JSW>>     ... Joe, W4TV
>>
>>
>> JSW>> 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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>>
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