Can I use Jensen JT-11-FLPCH
The greedy boy that I am, went ahead and bought Jensen JT-11-FLPCH transformers couple of months back along with Semisouth R100As, in anticipation of F6 build. But Papa's circuit that is published says JT-123-FLPCH.
Is there a way I can use the JT-11-FLPCH transformers?
Regards
The greedy boy that I am, went ahead and bought Jensen JT-11-FLPCH transformers couple of months back along with Semisouth R100As, in anticipation of F6 build. But Papa's circuit that is published says JT-123-FLPCH.
Is there a way I can use the JT-11-FLPCH transformers?
Regards
May I ask some question, the Jensen has a DC resistance of about 28 ohm, the Edcor XS4400 nearly 115 Ohm. In parallel the primaries have 14 or 57 Ohm.
So the feedback loop with the Edcor is more open, so I could try to reduce the 100 Ohm to a smaller value?
And is the 18 R concerned when the xformer has other data?
Thanks!
So the feedback loop with the Edcor is more open, so I could try to reduce the 100 Ohm to a smaller value?
And is the 18 R concerned when the xformer has other data?
Thanks!
Generg - that's irrelevant
just follow FB route ; node between 110R and 18R is where voltage is all what counts
Rdc of two paralleled primaries is irrelevant
just follow FB route ; node between 110R and 18R is where voltage is all what counts
Rdc of two paralleled primaries is irrelevant
link for us lazy ones , please
I was just on the Jensen site I can help out...transformer specs links:
JT-123-FLPCH
JT-11-FLPCH
Pa sez that you can use 2 same xformers in F6 , but I don't think that's most convenien , regarding price , in your case 
F6 needs 1:1+1 xfrmr
you have 1:1
whatever - buy JT-123-FLPCH (they're luckily less troublesome than Semisouth parts ) , and use JT-11-FLPCH either for input or output duty ...... in something
whatever - it's handy to have some isolation xformers in cousine ...... or house , generally 😉
F6 needs 1:1+1 xfrmr
you have 1:1
whatever - buy JT-123-FLPCH (they're luckily less troublesome than Semisouth parts ) , and use JT-11-FLPCH either for input or output duty ...... in something
whatever - it's handy to have some isolation xformers in cousine ...... or house , generally 😉
Pa sez that you can use 2 same xformers in F6 , but I don't think that's most convenien , regarding price , in your case
F6 needs 1:1+1 xfrmr
you have 1:1
whatever - buy JT-123-FLPCH (they're luckily less troublesome than Semisouth parts ) , and use JT-11-FLPCH either for input or output duty ...... in something
whatever - it's handy to have some isolation xformers in cousine ...... or house , generally 😉
Thanks. I will buy the right model.
some news....🙂
my gremlins worked again.....😀
I had the upper secondary winding on one Jensen not on the place 5 and 7 but on the lower place 6 and 8.
the other Jensen was correct....
and because I had some oscillation last days I checked the offset and AC output
and again in a rhythm of 12 sec one blue LED on the wrong channel was flickering and there was a high, very short AC peak of over 20V....
yes, I am mad it cannot be.....
I dare to say again... maybe this circuit reacts very quick on small differences between the two channels...
I have still the 1000uF, and of course reason for the instability is always a fault of mine, but so small faults....... Gremlins come on...😀
forgot.... after correcting the place all osci was gone...!
my gremlins worked again.....😀
I had the upper secondary winding on one Jensen not on the place 5 and 7 but on the lower place 6 and 8.
the other Jensen was correct....
and because I had some oscillation last days I checked the offset and AC output
and again in a rhythm of 12 sec one blue LED on the wrong channel was flickering and there was a high, very short AC peak of over 20V....
yes, I am mad it cannot be.....
I dare to say again... maybe this circuit reacts very quick on small differences between the two channels...
I have still the 1000uF, and of course reason for the instability is always a fault of mine, but so small faults....... Gremlins come on...😀
forgot.... after correcting the place all osci was gone...!
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maybe because unbuff version was tried earlier than buffered ........ and Pa in that moment had 22R laying on the bench
did you found your fave xformer yet ?
you can combine them - put two different ones in parallel , taking care of polarities
you can combine them - put two different ones in parallel , taking care of polarities
nelson, when should we plebs hope to see the F6 article ? Will it be on the FW site or in one of the mags ?
Yes, because of the long waiting I thought Nelson might wait till some F6 are produced at FW...And maybe he is alone in the production team. Son and nephew away, hope he found someone else...
Isnt it incredible that he is giving away for us all details of his probably commercial product for free........!?!! 😀😀
Isnt it incredible that he is giving away for us all details of his probably commercial product for free........!?!! 😀😀