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Re: New digital readout for the FRG-7

 

Nice modification,?
--

73 Lex PH2LB?
New digital readout for the FRG-7

 

Hi,
?
In a previous post, I've announced that I was making a new kit for a digital readout with also a MHz indication.?
Now I've assembled the first PCB's and they function?well.
For an impression, look at
@Pentagrid, concerning your remarks about the RACAL RA-17. I'm in the lucky position to own one now.
I'm busy, finding the right points for the signals and the power supply. The kit will probably replace the S-meter.
For anyone who is interested, please contact me.
?
Best regards,
Marcel de PA8MA
?
FRG-7 for sale.

Gary Sangwell 2E0IHS
 

Hi,
?
I have my FRG-7 for sale.
?
It is an early version without the "fine tune" control.
?
It is in good condition for its age an works well.
?
I am looking for offers near ?150 and it will need to be collected from RG31 area of Reading, Berkshire UK.
?
Comes completed with original manual and circuit diagram.
?

FRG7.mp4
FRG7.mp4

Re: Font used for FRG-7

 

Marcel, that is excellent work. Just a suggestion to increase the versatility of your design dramatically. As you know, the VCO frequency of the FRG 7 runs from 55 to? 85 mHz with a 55mHz 1st IF. The very common Racal R17 uses the same Wadley loop design, with slightly different VCO frequencies, this one spans 40 to 70 mHz with a 1st IF of 40 mHz.. IF you could find? a little room to program a few extra? bytes into the "megacycle" routine, a keypress perhaps to alter a pointer to a lookup table, this would increase interest enormously..... there are many Wadley loop receivers? out there.that are lacking a good readout, I think interest would be very high. I would buy two without question.
Re: Font used for FRG-7

Chris Rogers
 

Hi Marcel,
It looks good and I am glad you got it working well. I am looking forward to buying one.
Re: Font used for FRG-7

 

Hi Chris,
Coming back to your question concerning the MHz readout, it seems my proto is working well.
I could stay to the Arduino, but I had to squeeze everything out. I'm now at 99% of the memory.
I also switched to 7 segment characters. I've included some pictures.
Now I can start to design a new PCB. Hope to have it ready within a few months.
?
Regards, Marcel
?
Re: Font used for FRG-7

 

One more¡­ this one for $4.99 is cleaner and even closer! It¡¯s called ¡°Bebas Neue Semi Rounded¡±.
Link:
https://www.myfonts.com/products/regular-bebas-neue-semi-rounded-204747
73, Randy K7RAN

shot:
Re: Font used for FRG-7

 

Addendum¡­ screen shot for ¡°Redgar Clean¡± by Graphite (link in previous post):
Re: Font used for FRG-7

 

Hi gbrandy and Randy, thanks for your reply. I'll give a try.
73 de PA8MA
Marcel


Op vr 28 jun. 2024 15:21 schreef Randy K7RAN via <k7ran=[email protected]>:

The font ¡°Redgar Clean¡± by Graphite is a $12 font that comes pretty close! Note the serif on the number ¡°1¡± as well as the curves on the 3, and 5, and the straight vertical sides of the zero. Link:

73, Randy K7RAN

Re: Font used for FRG-7

 

The font ¡°Redgar Clean¡± by Graphite is a $12 font that comes pretty close! Note the serif on the number ¡°1¡± as well as the curves on the 3, and 5, and the straight vertical sides of the zero. Link:
https://www.myfonts.com/products/clean-redgar-162082
73, Randy K7RAN
Re: Font used for FRG-7

 

¿ªÔÆÌåÓý

If you can get a reasonably detailed picture of the dial, there are several web sites that can try to identify the font from a picture you upload to them. I believe I¡¯ve used this one in the past:

?

?

From: [email protected] <[email protected]> On Behalf Of Marcel, de PA8MA
Sent: Wednesday, June 26, 2024 3:24 AM
To: [email protected]
Subject: [Yaesu-FRG-7] Font used for FRG-7

?

Hello,

I'm working on a new version of the digital readout. Does anyone know which font has been used for the dial in the FRG-7?

Regards,
Marcel
de PA8MA

Re: Font used for FRG-7

 

Hi Chris, yes that is my goal. But it is more effort then expected. The Arduino run out of memory and the speed is too low. So I have switch to an ESP32. And a redesign of the pcb.


Op wo 26 jun. 2024 12:55 schreef Chris Rogers via <crvee8=[email protected]>:

Hi Marcel,
Does this version have the Mhzas well as the Khz readout?

Re: Font used for FRG-7

Chris Rogers
 

Hi Marcel,
Does this version have the Mhzas well as the Khz readout?
Font used for FRG-7

 

Hello,

I'm working on a new version of the digital readout. Does anyone know which font has been used for the dial in the FRG-7?

Regards,
Marcel
de PA8MA
Re: Lock light stays on

 

The mind boggles at some of the "mods" you find, most are just a bastardisation. This one appears to route DC through another fuse to the RCA connector at the back. The rest appears to be a tapping via the coax cable to something on the PCB. There are no active components on the added PCB so I am guessing its an output for an external frequency counter.
Re: Lock light stays on

 

There's a small board located on the underside of the RF board. I assume it's some type of mod.










There are 2 RCA jacks added on the back skirt of the receiver. Labeled VFO and PWR
Wonder if anyone is familiar with this mod...external VFO??
Re: Lock light stays on

 

Well again thanks much for your help..
As an industrial electrician for years I understand exactly your previous comment.
I guess it would be bad juju to say i hope it fails again but... maybe not..

Again thanks,

Brian
Re: Lock light stays on

 

In the repair industry, these "events" happen with no explanation, and are the worst thing. Do we give the radio back to the customer knowing full well it is not really repaired, but could fail again at any moment. On the other hand, how can we now repair it properly when it is working fine with no fault to hunt down. A conundrum.
I suggest thanking your lucky stars and enjoy the radio.
Re: Lock light stays on

 

Well here's a crazy turn of events.... I removed the cover on the HG unit. poked around a bit. Then removed the enclosure, looked things over and was about to to check the transistor as you suggested.
I powered the rig up and low and behold it's receiving!!! The lock light is going on and off like it should as I tune the MHZ control.
So I guess my question is: Is there a possibility that the crystal was "stuck" as the radio has been sitting for probably a few decades???
I think I'll still replace the crystal but wow... did not expect that... unless something else is lurking !!!
?
Re: Lock light stays on

 

The waveform you see at TP019 is the straight through leakage of the first VFO, this is normal, but not seeing anything as you tune up in frequency on the megacycle knob strongly suggests your HG is not working.
Because the lock light does come? on , and off , that suggests the selective amplifier is working fine.
The other TP monitors the second VFO, thats the kilocycle tuning, and given your measurements, is working fine. That section is seperate from the section you are dealing with, so at this stage can be ignored.
At this point, I would put my money on the? HG crystal, these can be found cheaply online.
Otherwise, measure the HG transistor voltages. These vary a little, but there should be around 9 volts on the collector, around 1 volt on the Base, and a few millivolts on the emitter for the transistor to oscillate. If these voltages are in the ballpark, the next step is to replace that crystal.
Replacing that crystal should see the old thing running again. Thats when you can realign the second VFO to conform to the drum markings.
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