[time-nuts] HP 117 from ebay

J. Forster jfor at quikus.com
Fri Jul 26 12:57:06 EDT 2013


IMO, it is unlikely you will be able to form the loop by hand on a
mandrel. I'd suggest a commercial conduit bender for that trade size
conduit and work your way along the tubing a few inches at a time.

-John

===============




>
>
>  
> List,
>  
> I bought one of them for several reasons besides
> that I really wanted it.
>  
> 1.  There is
> plenty of real estate to install Paul’s demod circuit.
>  
> 2.  It is
> large enough so the nuvistors can be replaced with dual gate mosfets (I
> have
> lots of them). Also sometimes replacement nuvistors can be obtained on
> ebay for
> a reasonable amount.
>  
> 3.  If
> needed, I believe most of the divider circuits can be relatively easily
> replaced with IC’s.
>  
> However the first thing I will do before firing it
> up (figuratively or literally) is to replace all the electrolytic caps.
>  
> I’m not interested in buying the antenna as there
> are numerous vlf antenna circuits with preamps for 60 KHz on the net. 
> One suggestion I found interesting was the
> idea of filling your tubing with wet sand then using a truck tire to bend
> the
> loop. Where to borrow a truck tire? It didn’t say.
>  
> Regards,
>  
> Perrier
>
>
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