Hey guys! Thanks for stopping by.
This ESP32 PLL VFO can work well with all the older Tube (Valve) type transceivers, Hybrids, and even some later models... providing accurate and stable frequency as a VFO (with offset). Examples include (but not limited to):
Heath-kit HW101, Yaesu FT-200, FT-101ZD, FT-902DM, FT-301, Kenwood/Trio TS-520, TS-820, and many others.
My sincere thanks to JF3HZB and DJ7OO for freely providing the code. It's a Retro-dial digital VFO using a Si5351 and an ESP32 - an original concept of JF3HZB - a Japanese Ham.
I specifically made this as an upgrade to my existing DDS VFO I was using on my HF Military manpack for 24 years. The manpack has a 1.6MHz IF therefore the output of this PLL is offset higher by 1.6MHz.
Let's power it ON
00:25:
I'm using a simple Mechanical encoder with switch from Bourns, and it has detents.
00:30:
This is the UP button for tuning steps - goes to a maximum 1MHz step.
00:38:
An this is the DOWN button for tuning steps - goes to a minimum of 10Hz.
00:40:
This is the memory button - stored in the sketch before run-time.
00:54:
And this push stores the last frequency used - so we go to the same frequency when powered-ON after last use.
00:58
You can see that it has gone back to the last frequency used.
1:06:
Now let's take a look inside the box.
1:13:
This is the audio DSP from Heil clear-speech which I bought in the junk many years ago.
1:17:
DSP-level, tone, and volume controls.
1:22:
It needed DC ground isolated jacks so I had to mount them this way.
1:25:
I used a chassis mount SMA connector for the output.
1:26:
This is the DC 13.8V input
1:28:
This hole is for a future headphone socket - which also needs to be isolated from DC ground.
1:32:
I'm using channel 2 on the Si5351. I can easily change the o/p to ch0 or ch1 - when needed for testing.
1:37:
I'm temporarily using a fat copper flat as a heatsink on this 7805 regulator. It does heat up at less than 300mA total current drawn.
1:41:
As can be seen, I'm using wire-wrapping to keep the project simple on a general-purpose PCB. Mounted on plastic spacers.
The display is a 1.8" TFT SPI 128 by 160
2:00:
Optical encoder from FT-767 repaired and repurposed for this project
And, let's now see it in action.
#esp32
#si5351
#JF3HZB
#DJ7OO
#dds
#arduino
#wb2cba
#pa3gsb
#dl2man
#radiojuice
#ad9866
#pihpsdr
#g0orx
#vu2xto
#vu2dle
#vu2dgr
#hermeslite-2
#Hermes
#Radioberry_Console
18 апр 2024
