Author Topic: The Pine Board Project (Metal Chassis Version)  (Read 486 times)

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Offline The Radio Shop

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The Pine Board Project (Metal Chassis Version)
« on: July 07, 2020, 04:47:32 PM »
In this thread we will be documenting "The Pine Board Project".
Ours will be in a metal chassis.

See link below to Bob Heil's website on this for more videos and documentation.
https://heilhamradio.com/amateur-radio-post/the-pine-board-project/

All credit for this goes to Bob Heil and his team on building this project.
Buddy kc4umo


Offline The Radio Shop

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Re: The Pine Board Project (Metal Chassis Version)
« Reply #2 on: July 09, 2020, 08:01:27 AM »
Started the power supply.

First thing I did was build the tube rectified circuit on the breadboard. We ended up with about 190 volts on the B+.
Now we know the transformer is 250 volts but this is what happens when you use tube rectification.

EDIT TO ADD PICTURES


I then built up a solid state  circuit.  But this time we get 390 volts on the B+ and a tap for the preamp at 190 volts.
Remember this is unloaded. No load on the supply.

EDIT TO ADD PICTURES
Buddy kc4umo

Offline The Radio Shop

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Re: The Pine Board Project (Metal Chassis Version)
« Reply #3 on: July 09, 2020, 07:35:08 PM »
Power supply has started. I decided to go with solid state. This is because the extra voltage is needed for more power out of the transmitter.
Buddy kc4umo

Offline Toolmanchris

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Re: The Pine Board Project (Metal Chassis Version)
« Reply #4 on: August 30, 2020, 05:57:55 PM »
Nice work as usual. Shame about the scratch though, been there and done that many times  :)

Offline The Radio Shop

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Re: The Pine Board Project (Metal Chassis Version)
« Reply #5 on: August 31, 2020, 07:22:04 PM »
Thanks,
I could not stand seeing that scratch. So removed the front panel, sanded and repainted it.
Buddy kc4umo