Troubleshooting an humming WOPL : need help!

Coldsmoke

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laatsch55 said:
Yep. You did go with the full comp option??
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Yes I did - even if I'm not sure of the difference to be expected in terms of sound -but I don't understand when I missed this cruxial information :/ I searched accross the web the la 30 minutes and these 95's look to be hard to find
 
Northwinds

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I just looked at Mouser and they don't have any in stock. That seems worrisome especially with the caveat "obsolete". Same thing with Arrow
 
Northwinds

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Hold your horses Bro, I am sure Lee or Joe can get you hooked up with them somehow. You already did the work, wait and see what they say

Regarding incandescent light bulbs, I have looked high and low for them and there is none to be had, even at Walmart. I hate the LED and other types, too expensive
 
MarkWComer

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Northwinds said:
I just looked at Mouser and they don't have any in stock. That seems worrisome especially with the caveat "obsolete". Same thing with Arrow
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The 21196 on Mouser also are tagged as obsolete...

Looks like trouble for future FC WOPL upgrades...
 
Northwinds

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If that's the case, is this the end of the ride for WOPL's once hoarded stocks run out or is Joe working on figuring suitable replacements?
 
Northwinds

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I just posted a thread on AK BT for some good used ones, maybe we can turn some up for you on the cheap
 
laatsch55

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They are not obsolete. Joe and I just got a couple hundred each. Florian I will get 8 headed your way.
 
MarkWComer

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laatsch55 said:
They are not obsolete. Joe and I just got a couple hundred each. Florian I will get 8 headed your way.
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Are you sure about that? See screen grab from the Mouser website:

NEVERMIND: I see what's going on. We're using the MJ21195G and MJ21196G.

 

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laatsch55

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The 21196G ROHS compliant part replaced the 21196 part the non-rohs compliant part is obsolete..
 
MarkWComer

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laatsch55 said:
The 21196G ROHS compliant part replaced the 21196 part the non-rohs compliant part is obsolete..
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My blood pressure returns to normal now, heart resumes beating...

I thought we were in trouble! I still want to get a PL700 and upgrade it eventually.
 
Gepetto

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Coldsmoke said:
Hello Joe, my answers:
-the 4 collector cases are not shorted with the chassis / silpads are installed
- no other screw in place
- here I am feeling stupid/lost all the transistors wère put back at their original place but are all the same and reading "66546 RCA 7632" ==> what information did I miss?
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Hi Florian
I believe you built your backplanes as Full Comp so you missed this vital info on page 1 of the instructions...

Backwall pre-driver and output driver transistors.

  1. 8 each MJ21196 (NPN) and 8 each MJ21195 (PNP) from ON Semiconductor for the Full Comp build version
  2. 12 each MJ21196 (NPN) from ON Semiconductor and 4 each RCA410 (NPN, salvaged from existing devices) for the Quasi Comp build version.
 
Gepetto

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MarkWComer said:
My blood pressure returns to normal now, heart resumes beating...

I thought we were in trouble! I still want to get a PL700 and upgrade it eventually.
Click to expand...
Put your hearts back in your chests guys. MJ21195/96 transistors are preferred devices for ON Semi. This was fun reading :)
 
Gepetto

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Northwinds said:
Hold your horses Bro, I am sure Lee or Joe can get you hooked up with them somehow. You already did the work, wait and see what they say

Regarding incandescent light bulbs, I have looked high and low for them and there is none to be had, even at Walmart. I hate the LED and other types, too expensive
Click to expand...
Must be a CT thing Ron, we have all the CT ones up here in MA :) Plenty everywhere you turn.
 
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