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The main dial light bulbs are burned up, the rubber is falling apart and I know that getting these light bulbs is getting harder by the years (some local stores ask $4+ for them).

So I wanted to replace them with 5mm warm white leds.?I designed a 5mm led holder which slips into the bracket for the light bulbs. First prototype fresh out of the printer. Looks good and it fits (due to a? difference in diameter on the center section, it slips into place and when rotated 90 dgr. it locks).

Bought some nice 5mm warm white leds and installed them.?

Also I started to work on a drop in replacement voor the PB-1560 PCB's (the light bulb PCB's between the MHz and Select) with 1206 SMD leds with the same color. I use 2 leds for each segment because the 1206 leds aren't that bright and this way you get a better light spread. Just simple testpads to solder the wires to.

?

(Yes I know MHz is with a capital H ;-) )?

Hope that before this weekend the SMD 1206 LEDS arrive so I can make a prototype to see how the light looks.

When all goes well I'm going to order a batch of prototype PCB's and upgrade my Frog.??
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73 Lex PH2LB?

I edited the page on my website to include a link to the TinkerCad 3D design for the LED holder and made the design publicly available so you print your own but licensed it .

Meaning :?

• Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• NonCommercial — You may not use the material for commercial purposes.?
• ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.

It's not to be childish but it now happened a few times that a 3D design I made was sold by other people just because is was "Open source, so I can do anything I want with it" without any credits or even a token of appreciation.?

Printing settings I used :?

• Material : PLA
• Layer height : 0.12mm?
• Infill : 100%?
• Support : Yes

73 Lex PH2LB?

Good work Phil! I love the idea of the eccentric self-locking bush, I will ask a friend with a printer...

I will use amber LEDs for the warm illumination

- Julian

Yesterday I received the prototype PCB's and couldn't resist assembling one set. In the evening I took one of my Frogs with a few defective light bulbs and replaced the PCB's

Initially the light was to "white" so I used a?Orange Edding 3000 permeant?marker on the LED's to get a more "light bulb" warm glow.

More photo's incl. on how to replace the main dial light bulbs can be found on my website :?

Enjoy.
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73 Lex PH2LB?

Hello Gerald,

?

There is indeed a stop system on the main dial. Mine also had problems and only needed some cleaning. Checkout my FRG-7 mod page on my website.

?<< image showing mechanism.?

Good luck.?
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73 Lex PH2LB?

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73 Lex PH2LB?

Printed one today and it looks good :?

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73 Lex PH2LB?

Thank you for linking to my blog.?

You have also a lot of interesting posts on you blog. Will take this evening catch up on them.?
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73 Lex PH2LB?

The following files have been uploaded to the Files area of the [email protected] group.

• /FRG-7 Switch Notes v1.0.pdf

By: Steve Quigg (VK2TUM) <stevequigg@...>

Description:
Notes on POWER/LIGHT switches and toggles for FRG-7

The following files have been updated in the Files area of the [email protected] group.

• //FRG-7 service notes/schematics/FRG Schematic Notes v1.0.pdf

By: Steve Quigg (VK2TUM) <stevequigg@...>

Description:
Notes about 2 hi-res schematics, also uploaded in this directory

Hi All,

I've uploaded a some files to /g/Yaesu-FRG-7/files/FRG-7%20service%20notes/schematics
Here's a bit from the covering document. Feedback welcome. Enjoy!

"There appear to be a proliferation of FRG-7 schematics on the web, of varying quality and with many differences.
The aim of this document is to present two high-resolution schematics which capture as much as possible of these
differences, plus a guide to tabulating differences of any schematic and the two given here.
These two schematics are presented here as files FRG-7_schematic_v{1/2}.0.gif."

Hi Steve,
Thanks for your work on the FRG-7 schematics. I numbered your new folder 4 - FRG-7 service notes so it will appear near the top of the default Files screen. I converted the two gif schematics to pdfs while leaving your original gifs alone.

73
Roger VE7LB Group Owner

Can you do me a power switch??

At the moment I don't have spare switch which i can take apart to design the knob.?

When I get my hands on one, I can try to design a switch knob. Or if somebody can give me detailed drawings etc.?

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73 Lex PH2LB?

Lex PH2LB <lex@...> added folder /Brooks FDU-7 - logic counting device

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The following files have been uploaded to the Files area of the [email protected] group.

• /Brooks FDU-7 - logic counting device/Brooks FDU-7 - logic counting device for FRG-7.pdf

By: Lex PH2LB <lex@...>

Description:
Scan of the Brooks FDU-7 logic counting device for FRG-7 installation document.

Hi Lex,
Thanks for uploading the Brooks FDU-7 display install instructions. Looking at the instructions I see that it uses two coaxes to count the MHz frequency and the VFO frequency for a 5 or 6 digit readout (EG : 10.000 or 10.0000?).? I have never heard of the Brooks unit and there is nothing on Google. Were they sold in Europe? If you happen to have one in your FRG-7 I would appreciate a picture.

73
Roger VE7LB

Hello Roger,

I used to have one in a FRG-7 which I got from a OM (the FRG-7 belonged to his father (SK OM Joop PA0JPC) and was in a bad shape). The counter worked, but I didn't like the look of it (and the jumping last digit made me nervous HI). So when I got my hands on a donor FRG-7 (which was in even worse shape), I removed the counter and restored the original drum.?

Last week the OM wrote to me that he was sorting through his fathers stuff and found all the original documentations including the (unused) warranty card and bill dated 19 may 1978, and he send it to me for my collection.?
Yesterday I received it and finally got installation documentation (Unfortunately no schematic) from the 3 digit the counter (it only slows the 0-999 KHz).?

Now having the name I googled around and found a ad in a magazine ( ) 1978. Indicating it's from B.Brookes Electronics from Norwich UK.
?

Scrolling through the video's on my mobile phone and I found 2 video's I made when I started the restoration of this FRG-7. So I uploaded them to YouTube the public can see them.

?&??

When I removed the Brooks FDU7 counter I documented how it was installed in the FRG-7. When you look a the photo's you can clearly see that it's digital technology from the 70's (reminding me of the components my father used for his electronics experiments in the 70's).?

I believe the aluminum case isn't original (it looks hand made).

For those who are interested, I don't use it and have it on sale on my website :??(?price is negotiable HI )

73 and stay safe

Lex PH2LB?

Hi Lex,

Thanks for adding to the information about the FRU-7 display. I have previously contacted you off list about buying the unit.

I gave to much credit to the 70's technology in my first post. The MHz digits could be derived by subtracting 3 from the H.GEN MHz signal.

Looking at the Block Diagram on page 8 of the FRG-7 manual. The FRU-7 must be counting the 3 - 32 MHz output of the H.GEN and subtracting the VFO frequency. Then the counter circuit must have a preset of .455 MHz that adds to the sum above. For example when tuned to 10 MHz:

H.GEN output is 13 MHz and the VFO is 3.455 MHz (13 - 3.455 = 9.545). Then add the IF frequency of .455 MHz to the above and you have 10 MHz. The FRU-7 doesn't display the MHz digits and shows .000 on the LED's.

It should be a more accurate display, on the upper bands, because the 1 MHz crystal doesn't have a calibration trimmer and any inaccuracy will show up as you increase the receive frequency. For example if the 1 MHz is off by 100 Hz the H.GEN output would be off by 300 Hz on the lowest band and 3,200 Hz on the highest band. Because the FRU-7 counts the H.GEN and VFO frequencies and the VFO can correct for the H.GEN offset the FRU-7 should show .000 when tuned to WWV.

73
Roger VE7LB