I bet it's Skippy brand, which clearly says you guys are secretly in denial about Vegemite. Even Skippy eats Vegemite.
https://www.youtube.com/watch?v=r3HkUKoGoc4
Heh. Well, preference of (or similarity to) spreads notwithstanding, I, for one, am interested in seeing as many variations of the circuits posted in these forums as possible. All of this is quite interesting.
I suppose I also have some ideas I have been sitting on, though. They need to be tested in the real world before released for comment, so I understand why you might not post immediately.
Yes exactly.
The idea is technically sound, and works exactly as expected in simulation, but I would like to try it first, before I do anymore preaching (that seems to get me into trouble here, hahahaha).
Does anyone happen to have the common pin out used by Jensen and Cinemag for the PC mount versions of the JT-123-FLPCH and CMOQ-4HPC? I don't see that information in the data sheets.
Also, are there equivalent Lundahl or Sowter part numbers? Maybe the LL1582?
Also, are there equivalent Lundahl or Sowter part numbers? Maybe the LL1582?
This defines the Cinemag pin 1, on the last page:
http://cinemag.biz/output/PDF/CMOQ-4.pdf
This defines the Jensen pinout, on page 1:
http://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-123-flpch.pdf
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Check Tea Bags' blog here diyAudio - Tea-Bag
He built a board that could use different transformers with a daughter card.
The pin IDs for the Jensen are on p.1, in the diagram. With the dot as the first number, the windings are: 1/3, 2/4, 5/7, and 6/8.
All the windings are identical, but you can take 1/3 and 2/4 as the primaries, and 5/7 and 6/8 as the secondaries.
The Cinemag pinout for the PCB version is missing from the data sheet, but it should be the same as one of their other units,
on p.5 of this data sheet: http://cinemag.biz/output/PDF/CMOQ-2.pdf
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It appears that the Cinemag corner pins (1, 6, 7, 12) are not connected. I'll check with Cinemag to verify this.
If this is right, then it would be: 2/4, 3/5, 8/10, 9/11 for the pairs, dot first.
I persuaded Cinemag to revise the data sheet to include the pcb version pin numbers.
http://cinemag.biz/output/PDF/CMOQ-4.pdf
Sweet! Thanks!
So, my remaining question above: any Lundahl or Sowter equivalents to consider? 🙂
So, my remaining question above: any Lundahl or Sowter equivalents to consider? 🙂
These are fine transformers, but a bit pricey.
I would personally consider the line input LL1540 which is cheaper. Difference is the DC resistance is in the 600-800 ohm range per winding, which I don't believe is a problem which also means you could omit the gate stoppers.
You might get a slight LF roll-off, maybe you can simulate to check it's not too much.
I've not checked if the pinouts are the same.
I would personally consider the line input LL1540 which is cheaper. Difference is the DC resistance is in the 600-800 ohm range per winding, which I don't believe is a problem which also means you could omit the gate stoppers.
You might get a slight LF roll-off, maybe you can simulate to check it's not too much.
I've not checked if the pinouts are the same.
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I just built an F6 with Lundahl 1527. They work but pinout is different. I switched it on for the first time today and will post measurements within the week.