[time-nuts] Some FTS1000 questions

[Lester Veenstra]

Boards?

Lester B Veenstra  K1YCM  MØYCM  W8YCM   6Y6Y
lester at veenstras.com

452 Stable Ln (HC84 RFD USPS Mail)
Keyser WV 26726

GPS: 39.336826 N  78.982287 W (Google)
GPS: 39.33682 N  78.9823741 W (GPSDO)


Telephones:
Home:                     +1-304-289-6057
US cell                    +1-304-790-9192 
Jamaica cell:           +1-876-456-8898 
 


-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at lists.febo.com] On Behalf Of xaos
Sent: Thursday, September 10, 2020 7:44 PM
To: time-nuts at lists.febo.com
Subject: Re: [time-nuts] Some FTS1000 questions

As usual, Dr. Griffiths has provided all we need.

Back in 2007 I had a similar issue and he worked out this very nice circuit
using easy to find 2N3904 BJTs.

I simulated the circuit using PSPICE. Here are the details.

https://www.darksmile.net/ee/frequency_doubler_BJT.html

George

On 9/10/2020 19:11, Bruce Griffiths wrote:
> You could use either the NIST CG JFET doubler or its bipolar CB
equivalent.
>
> Bruce
>> On 11 September 2020 at 08:43 Tobias Pluess <tpluess at ieee.org> wrote:
>>
>>
>> Dear colleagues
>>
>> I recently got a FTS1000 oscillator. (Not FTS1000A or B, but just
FTS1000,
>> I assume it is the first version). It is a very nice unit, but I wanted
to
>> know a bit more about its construction and opened it.
>> After I had replaced the foam which was already quite dissolved, I began
>> reverse engineering the output amplifier.
>> Has someone perhaps already done that?
>> I was thinking about whether it would be possible to replace the output
>> amplifier with one that has an integrated doubler (as my unit is a 5MHz
>> version).
>>
>> BR
>> Tobias
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at lists.febo.com
>> To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
>> and follow the instructions there.
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.

_______________________________________________
time-nuts mailing list -- time-nuts at lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.