Sorry OM. I just created a one off.
If I get another 4-5 people, I'll make a small batch of boards.
George
On 9/11/2020 10:42, Lester Veenstra via time-nuts wrote:
Boards?
Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y
les...@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-boun...@lists.febo.com] On Behalf Of xaos
Sent: Thursday, September 10, 2020 7:44 PM
To: time-nuts@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 <tplu...@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
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