Service Info on Magnum S9....

[guitar_199]

I'm sure this request happens from time to time... I just never dreamed I would actually OWN one.
Did Magnum not make something like a "service manual" for this thing???

I am aware of the content in CB Tricks but it is not quite complete. I have problems in the displays.. and there are no schematics of the "display driver" or "display" board. I realize that they aren't THAT complicated in and of themselves.... I just thought it would be handy to have them to go by.

That being said, I can't find much OTHER THAN what CB Tricks has.....

.... am I just looking in the wrong place? Or not holding my mouth right when I search????

Bob

 

[Eldorado828]

I'm sure this request happens from time to time... I just never dreamed I would actually OWN one.
Did Magnum not make something like a "service manual" for this thing???

I am aware of the content in CB Tricks but it is not quite complete. I have problems in the displays.. and there are no schematics of the "display driver" or "display" board. I realize that they aren't THAT complicated in and of themselves.... I just thought it would be handy to have them to go by.

That being said, I can't find much OTHER THAN what CB Tricks has.....

.... am I just looking in the wrong place? Or not holding my mouth right when I search????

Bob

The magnum s- series really is a unicorn these days. Boy they were the Stryker of circa 2005 with a big demand for them. If only Eric had of kept alive what Mr Sam did with Magnum International.

I still even have some of the frequency counter led's for the even more unicorn pure green versions (not many of those even back then).

 

[guitar_199]

The magnum s- series really is a unicorn these days. Boy they were the Stryker of circa 2005 with a big demand for them. If only Eric had of kept alive what Mr Sam did with Magnum International.

I still even have some of the frequency counter led's for the even more unicorn pure green versions (not many of those even back then).

Those LEDs are one of the primary things I am researching....

It appears that it is a 3 digit unit (2 of them) but... the question is.....

are they that wildly different from similar displays that you might find at Mouser or elsewhere??? Are they common cathode or common anode? And what about the pinout for the part? Are all displays of this ilk made with a common pinout??? (my bet would be NO WAY!!!!!)........

these are the things I am trying to figure out..... and they didn't make it easy with documentation.

By the way... if it is indicative of the age..... this one has the pair of 2SC1969 finals.

 

[undertaker]

I have 3 magnum radios. I will never let them go....

 

[Eldorado828]

Those LEDs are one of the primary things I am researching....

It appears that it is a 3 digit unit (2 of them) but... the question is.....

are they that wildly different from similar displays that you might find at Mouser or elsewhere??? Are they common cathode or common anode? And what about the pinout for the part? Are all displays of this ilk made with a common pinout??? (my bet would be NO WAY!!!!!)........

these are the things I am trying to figure out..... and they didn't make it easy with documentation.

By the way... if it is indicative of the age..... this one has the pair of 2SC1969 finals.

I've got some documentation as to the LED's but I still haven't gotten everything unpacked yet from the recent move. Yes they are 2 3 digit displays, as to the specs I couldn't tell you because I got them from ekl components(magnum) as oem parts so never needed to look elsewhere.
Bipolar transistors sure shows it's an early one and imo of the cleanest audio.

 

[guitar_199]

I've got some documentation as to the LED's but I still haven't gotten everything unpacked yet from the recent move. Yes they are 2 3 digit displays, as to the specs I couldn't tell you because I got them from ekl components(magnum) as oem parts so never needed to look elsewhere.
Bipolar transistors sure shows it's an early one and imo of the cleanest audio.

Good to know.... about the opinion on the bipolar version........

As for the displays... it will all come out in the wash.....

For one... I can always scope the LED driver lines from the chip to the resistor and on to the display segment and see if something THERE indicates a difference in drive level..... as it might even NOT be the displays!!!! At least I can hope....

Thanks for the responses!!!!!

Bob

 

[9C1Driver]

This is about the most information you will find for a Magnum S9. The channel/freq display board is a point of concern these days. The replacement part is no longer made, when they go bad your pretty much SOL.

Magnum S9, Magnum S-9NX Service Manual

Here is a link you a thread here when I had a broke S9 radio.

Magnum S9 Repair Help

Ok so I ended up buying this on the forum late last year. https://www.worldwidedx.com/threads/magnum-s9-for-sale.235741/ When I finally had time to mess with it the display is all janked up. Here are some still shots but it just shifts around but you never know what channel your on. A local...

www.worldwidedx.com

 

[slingslingbinks]

I also have a Magnum S-9 display problem. The 1st LED segment's E and G are dim. Here's a video of a display tester i made out of a Bread Board, some dip switches and a 2 cell, AA battery to power the led's. Now to find a P/N for the display's.

 

[nomadradio]

I may have a part number at work. We use a pair of three-digit common-anode sticks like this. The character height is a big deal. They sell 0.28, 0.36 and 0.4 inch three-digit sticks. Pretty sure they don't easily intermix. We have some 0.36 we use for a 6-digit counter display that fits in the VFO window of a Tram D201. Found some data for it online.

Can't remember if the Magnum used common-anode digits. Most likely choice that I see.

I'll report back next day I'm at work.

73

 

[nomadradio]

Here is a pinout we reverse-engineered with a power supply, resistors and gator leads. . This is a top-side view, not the usual bottom-side pinout you would see on a legit data sheet. The one on the top is the original three-digit 0.56-inch stick that came on the PLJ counter board. We removed them because they're too big to fit behind the window in a D201 or Siltronix VFO.

Here is the number on the zero point three-six inch digits we used for the perf-board prototype.

And this is the number on our first production batch of this trick.

When 7-segment LED displays were still new and high-tech the companies who made them were copied by generic suppliers later on. When a product falls from "high-tech" to "commodity", the big names who invented them move on, and the only sources are the folks who license the original designs. At first, the original numbers used by National, Toshiba, Monsanto, H-P, Lite-On and such were copied by the low-cost generic manufacturers. But now it's totally fractured. Six of the same display stick made by six different sources will each have a totally-different part number. Makes substitution a lot more work than it was when they were all listed in a ECG or NTE cross-ref book.

Don't know if these fit the Magnum freq counter, but this is what I have on digits of that size and type.


73

 

[nomadradio]

Lordy.. Measure twice, cut once.

My pinouts above may be wrong. I may have numbered them out of sync by one letter. The upper-right segment should be "a", the lower right "b", the bottom segment "c" and on clockwise to the top "f". Center segment is "g".

Looks like I started with the top segment as "a".

This pinout came from some long-forgotten fleabay listing I think. Probably the right one. This is a top-side view.

Probably.

73

 

[Eldorado828]

I had some a few moons ago in both the blue and pure green but they were unloaded on ebay. I'll check to see if I had any left.
The ekl replacement parts numbers are below
3D-28A blue
3D-28A green

 

[DTB Radio]

I'm in the middle of trouble-shooting one of these right now with no frequency display whatsoever. if I come up with anything useful for you, I'll post an update.

Update: I concur with Nomad's last pinout post. It appears to be correct. Also eliminates the displays as being the culprits in my case...

 

[slingslingbinks]

Hey Dave,
Good luck with your S-9.
That's the reason i made the tester to check out all the element's. I got burned on a hygain 5, modal 2705 channel display. After finding a display and installing the display, i found out the display wasn't the problem. The resistor oray was fubar, I Macgyvered some resistor's in it's place and got it working, It's not purdy, But it work's.

 

[slingslingbinks]

Buy 100 of them here,,,,,https://www.lanpade.com/7-segment-led-dot-matrix/2381bb.html