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Home Brew And Tech Forum / Re: The Pine Board Project (Metal Chassis Version)
« Last post by The Radio Shop 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.
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Home Brew And Tech Forum / Re: The Pine Board Project (Metal Chassis Version)
« Last post by Toolmanchris on August 30, 2020, 05:57:55 PM »
Nice work as usual. Shame about the scratch though, been there and done that many times  :)
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Electronic Video Blog / Re: #118 Yaesu FT-2800M No Power On Repair
« Last post by The Radio Shop on August 22, 2020, 07:08:00 PM »
That sounds like the RF final amplifier transistor is out.
This is a RF module. Sometimes the ceramic substrate cracks.  You can remove it, take the plastic case off and see if you can see a crack.

Have a look at this page for an example.
https://www.rftechnology.com.au/downloads/EB0405.pdf
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Electronic Video Blog / Re: #118 Yaesu FT-2800M No Power On Repair
« Last post by Jnagle81 on August 22, 2020, 03:03:04 PM »
I just aquired a yaesu ft-5100 and it has low output on vfh <1w. Do you have any videos on this unit or have any resources for it. Thanks
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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.
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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
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Home Brew And Tech Forum / The Pine Board Project (Metal Chassis Version)
« Last post by The Radio Shop 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.
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New member welcome / Re: Greetings!
« Last post by The Radio Shop on June 21, 2020, 07:08:17 PM »
Hi  and welcome.

Tell us a little about you followed by what information you are seeking.
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New member welcome / Greetings!
« Last post by CASanders on June 21, 2020, 06:59:35 PM »
Hi from SW Indiana.  Found the forum while searching for repair information for my IC-745.  I hope to get some info here towards that!

Thank you for hosting this forum
73
W9ROX
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