Krell Kma160b
Hello
On an amplifier Krell KMA160b, it I break down misses I a output voltage of the transformer, this tension will feed the stages driver. I sent an email at Krell industry without success, they do not want to give the plans of this amplifier, I must have this same breakdown service me,
Know where to buy the same type of transformer that those used at Krell?
Sorry for my pitiful English.
Regards
Pierre-Marie (
Hello
On an amplifier Krell KMA160b, it I break down misses I a output voltage of the transformer, this tension will feed the stages driver. I sent an email at Krell industry without success, they do not want to give the plans of this amplifier, I must have this same breakdown service me,
Know where to buy the same type of transformer that those used at Krell?
Sorry for my pitiful English.
Regards
Pierre-Marie (
I see that JWB with successful to transform its KMA into KSA, it has can be a transformer to sell ? but I cannot currently join it my statute does not allow it yet... :-(
Pierre-Marie
Pierre-Marie
Hello Andrew
I have a second block mono Krell, I compared the output voltages of transformer, all is identical, I have all the tensions on the part power the relays of exit go up, I miss only that of the photograph (drivers), and I do not have continuity in between the connectors, I am afraid which this part of the tranformator is cut, I would like to contact JBW but I cannot do it, I do not include/understand why that is refused to me.
Regards
Pierre-Marie
"Sorry for English of my translator" :-(
I have a second block mono Krell, I compared the output voltages of transformer, all is identical, I have all the tensions on the part power the relays of exit go up, I miss only that of the photograph (drivers), and I do not have continuity in between the connectors, I am afraid which this part of the tranformator is cut, I would like to contact JBW but I cannot do it, I do not include/understand why that is refused to me.
Regards
Pierre-Marie
"Sorry for English of my translator" :-(
Hi,
your response confirms that power is getting into the transformer, so it's not the soft start and bypass that has gone faulty.
your response confirms that power is getting into the transformer, so it's not the soft start and bypass that has gone faulty.
Hello Holland:
I will make more research with a friend this after midday and will try to give you more information 🙂
Regards
Pierre-Marie
I will make more research with a friend this after midday and will try to give you more information 🙂
Regards
Pierre-Marie
Salut, mon petit Bleu. 
Déja regardé a le transformateur sans la couverture ?
(Inglese : you looky at transformer yet ?)
Déja regardé a le transformateur sans la couverture ?
(Inglese : you looky at transformer yet ?)
Hello jacco vermeulen
I think that it is not possible to remove the cap of the trasformator, that all is moulded in the resin.
I succeeded in sending a message JWB which already entirely dismounted to them his
Krell industrie will give me Monday the price of a transformer, I believe that I will be afraid of the price
Regards
Pierrot
I think that it is not possible to remove the cap of the trasformator, that all is moulded in the resin.
I succeeded in sending a message JWB which already entirely dismounted to them his
Krell industrie will give me Monday the price of a transformer, I believe that I will be afraid of the price
Regards
Pierrot
Yeah, the price will likely be very scary.
Question remains whether the toroid can be repaired, i can hardly imagine a single one fail.
Did you measure resistance of the primaries and secondaries ?
Epoxy resin does not hold well on metal, it is possible to get the pan off.(but not in a gentle fashion)
Question remains whether the toroid can be repaired, i can hardly imagine a single one fail.
Did you measure resistance of the primaries and secondaries ?
Epoxy resin does not hold well on metal, it is possible to get the pan off.(but not in a gentle fashion)
These yellow wires look very thin as do the grey ones on the left hand (edit: right hand) side coming from under the trafo.
You sure these are transformer windings?
You sure these are transformer windings?
Hello Belgian friends
IT is not easy to raise the transformer for seeing well from which leave the yellow and gray wire, I will do this after midday.
Pierrot
IT is not easy to raise the transformer for seeing well from which leave the yellow and gray wire, I will do this after midday.
Pierrot
Don't cut wires.
It's hard to tell what's wrong without schematic and it would surprise me if the transformer were bad.
/Hugo
It's hard to tell what's wrong without schematic and it would surprise me if the transformer were bad.
/Hugo
Hello
I all will dismount and turn over the transformer, because we think more of one connections at exit which would be bad.
Pierrot
I all will dismount and turn over the transformer, because we think more of one connections at exit which would be bad.
Pierrot
The yellow wires in your KMA-160 are not used. The grey wires are for the low power AC feed to the input board. If you have 72V on the grey pair, then that's fine! Actually 80V is what the design calls for, but 72V is also fine (depends on your local power company).
I suggest you look elsewhere for the problem. For example, what is the potential at the output of the regulators on the board?
-jwb
I suggest you look elsewhere for the problem. For example, what is the potential at the output of the regulators on the board?
-jwb
I see. So what is the "72V" in your picture? When you plug the grey pair into the board, there is no voltage on the yellow capacitors?
- Status
- Not open for further replies.