[time-nuts] HP 117/10509a...

[Merchison Burke]

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
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: 07/05/12
>
>