Got the scope up and running.
HP 8568B !
Traded time for a spectrum analyzer in very good shape.
Was also surprised my HP209A Oscillator had such clean output.
Bought a new Goot solder sucker from Jaycar to replace the old one that died.
The circular lock ring had been broken for while, but it was still working fine.
Then something came loose as I was depressing the plunger and pinged across room, never found it.
Then something came loose as I was depressing the plunger and pinged across room, never found it.
Yes the E clip breaks from the continual pounding when you press the release button.
When mine broke I didn't have an E clip of the right size so I just twisted some 1.6mm soft steel wire into the groove and it's still there many years later.
It looks like a nice meter at first. But trying to work out where 12v is on the scale gets annoying fast.
It looks like a nice meter at first. But trying to work out where 12v is on the scale gets annoying fast.
Yeah, that 15V scale isn't exactly 'user friendly', is it?
-Pat
It looks like a nice meter at first. But trying to work out where 12v is on the scale gets annoying fast.
Open it up and make a red mark at the 12V point. I did that with my first analogue meter, way back when. It made life a lot easier.
McBryce.
Yeah, that 15V scale isn't exactly 'user friendly', is it?
-Pat
It's distracting. I can't think of any simple way I could mess with it to make it better. Reprint the scale maybe?
Open it up and make a red mark at the 12V point. I did that with my first analogue meter, way back when. It made life a lot easier.
McBryce.
I thought about that. But it just seems criminal to vandalize an otherwise fine-looking meter.
And there's no screws so it's not easy to open, either. Well, anything is easy to open...
Yeah, that 15V scale isn't exactly 'user friendly', is it?
-Pat
It's distracting. I can't think of any simple way I could mess with it to make it better. Reprint the scale maybe?
Ooh, we do like to be spoon-fed, don't we?
12V is 2.4 on the bottom scale.
Each division equals 0.5v on the top scale
Not hard to read, but not immediate either.
Finally got an HP (Symmetricom) 58503B GPSDO with opt 001(VFD display). It has been fully recapped and has just over 7 years on the clock. Performing extremely well so far. It sits nicely on the 58502A distribution amplifier.
Sweet! I've been half-heartedly looking for one of those, but thus far all I've seen have been going for more than I'm inclined to spend. ...some day... Nice piece of kit!
-Pat
Finally got an HP (Symmetricom) 58503B GPSDO with opt 001(VFD display). It has been fully recapped and has just over 7 years on the clock. Performing extremely well so far. It sits nicely on the 58502A distribution amplifier.
So if you remove the sticker who says Symmetricom under it it would be HP right?
Another thing, since i never used that equipment, what is the meaning of the sphere on the bottom right with the different colours? Position of the satellite constellation and their respective signal strength?
Or how many different satellite signals the equipment is receiving? So that's why the up corner of the sphere is currently empty, because it can't receive?
Sorry for the noob questions.
Finally got an HP (Symmetricom) 58503B GPSDO with opt 001(VFD display). It has been fully recapped and has just over 7 years on the clock. Performing extremely well so far. It sits nicely on the 58502A distribution amplifier.
So if you remove the sticker who says Symmetricom under it it would be HP right?
Another thing, since i never used that equipment, what is the meaning of the sphere on the bottom right with the different colours? Position of the satellite constellation and their respective signal strength?
Or how many different satellite signals the equipment is receiving? So that's why the up corner of the sphere is currently empty, because it can't receive?
Sorry for the noob questions.
Yes, it does say Hewlett Packard under the Symmetricom label(and I am very tempted to peel it off).
The sphere in the bottom right of Lady Heather shows the signal strength(indicated by color) of the satellites over time at the antenna location. There is a hole to the north because I'm in the northern hemisphere and there are no GPS satellites over the poles. If you were below the equator you'd have the hole without signals to the south of you.
At the time this screenshot was taken the GPS receiver is receiving and using 8 satellites, the GPS antenna is mounted outside on an antenna tower.
Lady Heather is an amazing program that supports a vast array of GPSDO's, it is worth checking out if you have one.
Sweet! I've been half-heartedly looking for one of those, but thus far all I've seen have been going for more than I'm inclined to spend. ...some day... Nice piece of kit!
-Pat
I highly recommend one if you can find it for a reasonable price. The VFD and entire front panel are from the 5313x series of frequency counters. However the entire inside front panel was sprayed with conductive shielding paint, I don't recall seeing that on the frequency counters I have taken apart.
Lady Heather is an amazing program that supports a vast array of GPSDO's, it is worth checking out if you have one.
Thanks for the mention of Lady Heather. After a few fits
I got it working on my setup.
I got a few YM2151 today, EUR 5 per chip. Finally I could test my board with it:
I got some fake YM2151 last week, about EUR 1 per chip, refund request sent. I guess if the price is too good to be true, then I shouldn't buy it.
I got a few YM2151 today, EUR 5 per chip. Finally I could test my board with it:
Is there a topic about this ?
Are you going to build your own 128 voice poly synth with it or ?
No, there is no topic here for it. I posted more details about it in a Facebook group about the upcoming Commander X16 (I think you need to be member of the group to see it)
https://www.facebook.com/groups/CommanderX16/permalink/536904327060666/This computer will probably use the YM2151 as one of two sound chips. I already implemented a software emulation for it in the Commander X16 emulator, thought it would be fun to compare it with the real chip. I probably will only populate the 10 boards I have and give it away to friends (I got already 2 requests), and sell the rest, I don't plan to build something big with it. It has an integrated SAMD21, which can be programmed over USB with the Arduino IDE, and which was another reason for me to build it, to have a reusable SAMD21 circuit component with USB and Arduino for other projects, and it can be connected to the expansion port of a Commodore 64 and used from there. But probably not worth the trouble to build more of it, with the uncertainty to get enough working YM2151 chips for it.
Nice to see someone bringing an alternative sound chip to the C64 instead of just claiming that the SID rules them all.
McBryce.