Author Topic: Frequency Counter Buffer Project  (Read 880 times)

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Offline ko4nrbsTopic starter

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Online nctnico

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Re: Frequency Counter Buffer Project
« Reply #1 on: November 09, 2022, 02:52:22 pm »
Wouldn't a standard 1:100 oscilloscope probe with a BNC adapter do the trick?
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline ko4nrbsTopic starter

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Re: Frequency Counter Buffer Project
« Reply #2 on: November 09, 2022, 02:57:27 pm »
Wouldn't a standard 1:100 oscilloscope probe with a BNC adapter do the trick?
Yes.  Wanted something I can use to monitor the VFO frequency of my old AM transmitter while operating.  I have used a commercial demodulator and sampler to view the transmitters output while modulating the output. 

Bill
 

Offline mag_therm

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Re: Frequency Counter Buffer Project
« Reply #3 on: November 09, 2022, 03:32:01 pm »
I made a buffer from vintage sw receiver vfo to a PLJ_0802-C frequency display (with IF Offsets).
It is just a FET- Bipolar HiZ to 50 Ohm with a RG 174 coax to the display in another chassis.
input level 50  to 200 mV.
 
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Offline ko4nrbsTopic starter

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Re: Frequency Counter Buffer Project
« Reply #4 on: November 09, 2022, 04:48:03 pm »
I made a buffer from vintage sw receiver vfo to a PLJ_0802-C frequency display (with IF Offsets).
It is just a FET- Bipolar HiZ to 50 Ohm with a RG 174 coax to the display in another chassis.
input level 50  to 200 mV.
Which FET- Bipolar HiZ did you use?
Bill
 

Offline mag_therm

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Re: Frequency Counter Buffer Project
« Reply #5 on: November 09, 2022, 05:16:50 pm »
I made a buffer from vintage sw receiver vfo to a PLJ_0802-C frequency display (with IF Offsets).
It is just a FET- Bipolar HiZ to 50 Ohm with a RG 174 coax to the display in another chassis.
input level 50  to 200 mV.
Which FET- Bipolar HiZ did you use?
Bill

Home-brew 2n4416 into a 2n3904 as emitter follower

Edit :
Fet_Bi_Buffer qucs circuit with bias voltages:
https://app.box.com/s/74j8faqyjbk1xsjudkw7ngy9s4q5jnyi
« Last Edit: November 09, 2022, 05:35:54 pm by mag_therm »
 
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