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Date
Re: Looking for main tuning knob.

 

Hello Andrew,

These are very hard to come by. I had the same problem and often 3D print parts, I designed my own (as close as to the orginal as possible).?

frg7-knob-01

?

So when you access to a 3D printer (of not ask, friends, family, you local community center) you can print your own.
--

73 Lex PH2LB?
Looking for main tuning knob.

 

Wondering if anyone has the main tuning knob they would be willing to sell?


Andrew
Re: Digital readout

 

I should have mentioned my goal is to replace the kHz drum with a 3 digit display
Re: Digital readout

 

I used some of these many years ago and they were awesome deals
unfortunately they are discontinued


https://www.pongrance.com/
Re: Digital readout

 

Thanks but my budget is around $20
Re: Digital readout

 

Mike M.

See the link below which has my review of the Electronic Specialty Products DD-103:


I installed this display on my Yaesu FRG-7 this year and it works nicely.? Not cheap, but well made.? It also works on many other receivers.

Bob B.

On Mon, Sep 12, 2022, 12:58 Roger VE7LB <Roger_VE7LB@...> wrote:
Hi Paolo,
?Thanks for the display info. I copied your pdf's over to the files section and added translated english versions as well:? /g/Yaesu-FRG-7/files/6%20-%20FRG-7%20with%20non%20GAR-7%20Digital%20Readouts/Paolo%20Viappiani%20Display? .

73
Roger VE7LB Group Owner

Re: Digital readout

 

Hi Paolo,
?Thanks for the display info. I copied your pdf's over to the files section and added translated english versions as well:? /g/Yaesu-FRG-7/files/6%20-%20FRG-7%20with%20non%20GAR-7%20Digital%20Readouts/Paolo%20Viappiani%20Display? .

73
Roger VE7LB Group Owner
Re: Digital readout

 

Hi, please look at the attached articles (unfortunately they are written in Italian, but almost easy to be read).
Good work, regards!
Paolo Viappiani

FRG-7_Viappiani.pdf
FRG-7_Viappiani.pdf
FRG-7 over-range Viappiani.pdf
FRG-7 over-range Viappiani.pdf

Digital readout

 

has anyone added digital readout to their FRG-7 this year ?
L101 pin not soldered

 

I just took delivery of a fixer upper FRG-7. I did a full alignment but was still disappointment with the results of this receiver. So I put in on the bench and found that L101 (4 coils on a rod after the RF AMP) the first pin was not soldered to the coil wire. See picture:

After soldering I am now getting a 20-30 dB improvement in reception. At 1.5 MHz -55dBm gave me S9 before soldering now I get -78dBm giving me S9.
I have a question do others have this coil not soldered and only wire wrapped. I am just curious if this was Yaesu's manufacturing process or if this was just forgotten to be solder and thus a defect.

This is my first post so it might take time to post. Thanks for your time.

Bruce, WB6IZG

Re: Another 3D printed knob for the FRG-7 added to my collection.

 

Great job Lex,

I have two suggestions:
I believe that spun replacements for the metallic inserts are available from restoration places but may have to be cut to fit.
If you use ABS in black you can soften or eliminate the printing lines with an acetone cloud in a plastic bag.

John
KC9OJV
Another 3D printed knob for the FRG-7 added to my collection.

 

Recently I got a question from a fellow ham if I have a replacement knob for the Fine-Tune. Unfortunatly I didn't but told them that I wanted to 3D design all the knobs of the FRG-7.

So during my holiday I started to work on the 3 knob of the FRG-7. The one which can be used for the Preselect, Mhz and the Volume.

frg7-knob-06

My first prototype print (0.12mm / 100% infill) next to a original knob of my FRG-7.

frg7-knob-07

I'm quite happy with the result and will continue working on the others. So when you need replacements knobs, stay tuned. Soon they will be ready and released on my website.??

--

73 Lex PH2LB?
Re: FRG-7 lock light problem

 

I have noticed that the lock light in my FRG-7 dims with humidity. I doubt this is the problem that yitzimarks@... is observing, but I toss this observation in to see if anyone else has seen that issue and resolved it.

-- Gary KD1TE
FRG-8800 keypads

 

Hi,
I hope it's not too off-topic to discuss the 8800 here as I can't find a dedicated group for this RX. Mine has problems with excessive contact bounce in the numeric keypad. What is the construction, is it membrane keypad or are there individual switches that can be cleaned?

Apart from this and the occasional PLL lock issue when it gets to warm, I'm happy with how it performs.

73
Nick
Re: FRG-7 lock light problem

 

Hi, just go through the area with a soldering iron and reflow all the connections. The main components that control the Led are Q110 and Q111, plus the surrounding resistors and capacitors. I assume you have a schematic diagram.?


On Thu, Aug 4, 2022 at 9:00 AM, yitzimarks@...
<yitzimarks@...> wrote:
Thanks for the explanation.?

Last night I tested the voltage at the joint of the led wire. It was 1.45v when the led was working (fist time starting the radio after letting it sit for a few hours) then it dropped slowly all the way to 0v.

I tried to trace the what the led is connected to on the circuit board but it got a little bit confusing.

If I post a high resolution picture of the circuit board, will you be able to spot a bad joint??

Re: FRG-7 lock light problem

 

Thanks for the explanation.?

Last night I tested the voltage at the joint of the led wire. It was 1.45v when the led was working (fist time starting the radio after letting it sit for a few hours) then it dropped slowly all the way to 0v.

I tried to trace the what the led is connected to on the circuit board but it got a little bit confusing.

If I post a high resolution picture of the circuit board, will you be able to spot a bad joint??
Re: FRG-7 lock light problem

 

It gets worse because when the radio is on it heats up. The bad joint opens because of Thermal expantion. It might not be the wire for the Led, it could be any of the transistors, resistors, etc associated with the Led operation.?

Bob


On Thu, Aug 4, 2022 at 5:41 AM, yitzimarks@...
<yitzimarks@...> wrote:
But why would it get worse when the radio is on?
I checked all the joints, they look fine.?

Re: FRG-7 lock light problem

 

But why would it get worse when the radio is on?
I checked all the joints, they look fine.?
Re: FRG-7 lock light problem

 

Hi, sounds exactly like a bad solder joint. Probably at the pcb end. If your handy with a soldering iron, it should be an easy fix.? Hope this helps.?

Bob


On Wed, Aug 3, 2022 at 8:03 PM, yitzimarks@...
<yitzimarks@...> wrote:
Hi there.?

My friend very kindly gave my his old FRG-7. It works really well and I love it!

It has one problem. The lock Led will not work, unless the radio was turned off and sitting for a few hours.?
Then, the led will work but only very dimly. The led will continue getting dimmer and after a few minutes it will simply stop working.?
The actual bulb is fine, I know this because when powering up the radio, it will light up for less than a second at full brightness.

It's a strange problem. It seems like as the radio warms, up the led stops working.?

Other than that, everything works fine!?

I will appreciate any help, and I thank you in advance.?
FRG-7 lock light problem

 

Hi there.?

My friend very kindly gave my his old FRG-7. It works really well and I love it!

It has one problem. The lock Led will not work, unless the radio was turned off and sitting for a few hours.?
Then, the led will work but only very dimly. The led will continue getting dimmer and after a few minutes it will simply stop working.?
The actual bulb is fine, I know this because when powering up the radio, it will light up for less than a second at full brightness.

It's a strange problem. It seems like as the radio warms, up the led stops working.?

Other than that, everything works fine!?

I will appreciate any help, and I thank you in advance.?
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