Re: [time-nuts] rf generator/attenuator

2018-12-15 Thread Richard (Rick) Karlquist

I already thought of this.  There are two missing
components:

1.  An ALC output amplifier to get a high, regulated output level.
Did you encounter anything like this on EBay?

2.  A shielded box for the ADF435X.

Rick

On 12/15/2018 11:43 AM, djl wrote:

See:
sv1...@40gmail.com
modules to do what you wanted. With a nice oled and arduino, ADF4351=20
35-4400 MHz PLL external or internal 10 MHz reference and a controllable
attenuator. Greek modules, not Chinese. Total cost seems to be about $80
or so.
   I also found modules like these on EBAY for around $25 each from the
old country. hurry before the tariffs start! I think serviceable signal
source, GPSDO locked, can be built from modules for under $100
Considering my first Polarad microwave generator at about 60 pounds and
able to heat the shack, it's a bargain. Time spent looking, about 15 
minutes.

Don



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[time-nuts] rf generator/attenuator

2018-12-15 Thread djl

See:
sv1...@40gmail.com
modules to do what you wanted. With a nice oled and arduino, ADF4351=20
35-4400 MHz PLL external or internal 10 MHz reference and a controllable
attenuator. Greek modules, not Chinese. Total cost seems to be about $80
or so.
  I also found modules like these on EBAY for around $25 each from the
old country. hurry before the tariffs start! I think serviceable signal
source, GPSDO locked, can be built from modules for under $100
Considering my first Polarad microwave generator at about 60 pounds and
able to heat the shack, it's a bargain. Time spent looking, about 15 
minutes.

Don

--
Dr. Don Latham  AJ7LL
PO Box 404, Frenchtown, MT, 59834
VOX: 406-626-4304


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