[time-nuts] HP 117/10509a...
Merchison Burke
merchison at yahoo.co.uk
Thu Jul 5 16:32:34 UTC 2012
I thought about doing that but I did not want to spend a lot of time
experimenting fruitlessly.
Thanks for the encouragement.
Merchison
On 2012-07-05 11:19 AM, Burt I. Weiner wrote:
> Many years ago I had one of these antennas that I used with a Gertsch
> RLF-1 WWVB receiver. When the Nuvistors became old and feeble I
> decided to change the 6CW4 Nuvistors to FETs. Being young and foolish
> and thinking this is basically audio, I went to Radio Shack and got
> some N-Channel FETs and stuffed the FET's leads into the appropriate
> Nuvistor socket pins: Gate to Grid, Source to Cathode, and Drain to
> Plate. As I recall, I had to add a wee bit of capacitance to make it
> tune back down to 60 KC - back then I didn't know from kHz. I made a
> voltage divider inside the antenna's junction box to get the higher
> voltage down to what the FETs wanted. It ran fine for the remaining 8
> to10 years that I used the RLF-1's. I forget where the antenna went,
> but it may still be in use somewhere. At least I hope so.
>
> Burt, K6OQK
>
>> From: Merchison Burke <merchison at yahoo.co.uk>
>> To: time-nuts at febo.com
>> Subject: [time-nuts] HP 117/10509a
>>
>> Hello,
>>
>> Has anyone successfully replaces the Nuvistors in the 117 and the 10509a
>> with FETs. I would like to replace them with inexpensive FETs instead of
>> buying the expensive Nunistors.
>>
>> Thanks for all help,
>> Merchison
>
> Burt I. Weiner Associates
> Broadcast Technical Services
> Glendale, California U.S.A.
> biwa at att.net
> www.biwa.cc
> K6OQK
>
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