Vince that is a very cool story about the FT-101.....one of the most mind-blowing things ever happened to me was when Jerry here finally got me to understand that a mixer would do quite well with a SQUARE WAVE INPUT.......I never understood mixers so well, ever in my life before reading things on this forum.....opened a new vista for me about radios.
________________________________________
From:
[email protected] <
[email protected]> on behalf of Vince Vielhaber <vev@...>
Sent: Sunday, December 17, 2017 10:57 PM
To:
[email protected]Subject: Re: [BITX20] Help! I think I may have just ruined my 9 year old's Chanukah
I bought a Yaesu FT-101EX that someone robbed some parts out of (it was
guaranteed to have some missing parts) and among the missing parts were
the 10 meter crystals (11 meter crystal was there tho). So I made a
little circuit that plugged into the crystal sockets after I removed all
of 'em, and it connected to an arduino nano and an Si5351. Change the
band switch and the 5351 injects the right signal. They were all a bit
off freq tho. I didn't pay much attention at the time but it's gotta
come back to the bench soon, so I'll take care of that as well.
Vince.
On 12/17/2017 10:50 PM, Gordon Gibby wrote:
Vince -- I barely understand the IDE environment.....have no idea how those extra .ino's got added.....but I can code enough C to get things working and found that every one ofmy 4 or 5 raduinos was between 4 and 5 kHz HIGH at 25 MHz.
So i just change the crystal frequency in the sketch and bingo! no calibratin needed. Measure the BFO cystal oscillator andput THAT inthe sketch also and BINGO! perfect frequency accuracy right out of the box.
Then I realized I could replace theVFO in my Heathkit--- measured all the heterodyne oscillators (using a receiver) and the BFO oscillators in theheahtkit and rewrote the sketch to PERFECTLY control the heathkit --- also made it simulate an FT-857d so now computer controllable --- I put the sketch on GitHub (never did THAT before!) and bingo, we have a computer controllable, digitally accurate Heahtkit athat is is virutally immmune to EMP. For our EOC.
Gordon
________________________________________
From: [email protected] <[email protected]> on behalf of Vince Vielhaber <vev@...>
Sent: Sunday, December 17, 2017 10:40 PM
To: [email protected]
Subject: Re: [BITX20] Help! I think I may have just ruined my 9 year old's Chanukah
Yeah, I shoulda added it wont necessarily be right on freq.
Vince.
On 12/17/2017 10:38 PM, Gordon Gibby wrote:
"Unplug and remove the raduino and take it over near the HF rig with
it connected to the computer (I'm assuming the computer and HF rig
are near each other or can be). Then you can check for 5MHz signal
when the raduino is tuned to 7.000 and 5.300MHz when the raduino is
tuned to 7.300, and, of course, points in between.
Ok....I will try that right now?"
Cool -- good move. Search around a bit and hopefully you'll find the
signal!!!! If you do, you'll be several miles ahead on this project.
Gordon
------------------------------------------------------------------------
*From:* [email protected] <[email protected]> on behalf of
tausciam@... <tausciam@...>
*Sent:* Sunday, December 17, 2017 10:34 PM
*To:* [email protected]
*Subject:* Re: [BITX20] Help! I think I may have just ruined my 9 year
old's Chanukah
On Sun, Dec 17, 2017 at 07:27 pm, Vince Vielhaber wrote:
Unplug and remove the raduino and take it over near the HF rig with
it connected to the computer (I'm assuming the computer and HF rig
are near each other or can be). Then you can check for 5MHz signal
when the raduino is tuned to 7.000 and 5.300MHz when the raduino is
tuned to 7.300, and, of course, points in between.
Ok....I will try that right now
--
Michigan VHF Corp.
--
Michigan VHF Corp.
