Akg C12 a cable help!
- Thread starter OPR
- Start date
Help Support GroupDIY Audio Forum:
http://www.datasheets360.com/pdf/7062128648334303986
http://www.peigenesis.com/en/itt-cannon-connectors/standard-k-connectors.html#wall-mount-plug
-Check dimensions section
https://www.peigenesis.com/images/content/pei_tabs/ittcannon/standard-k-series/pdf-thumbs/standard-k-series.pdf
-this should be best
Maybe this will help you somehow.
It seems to looks different than which i had.
Are you able to measure transformer ratio?
http://www.peigenesis.com/en/itt-cannon-connectors/standard-k-connectors.html#wall-mount-plug
-Check dimensions section
https://www.peigenesis.com/images/content/pei_tabs/ittcannon/standard-k-series/pdf-thumbs/standard-k-series.pdf
-this should be best
Maybe this will help you somehow.
It seems to looks different than which i had.
Are you able to measure transformer ratio?
klausheyne
Member
- Joined
- Jun 4, 2016
- Messages
- 19
This is the procedure on STOCK C12 A Cannons (which yours is not- neither on the cable nor the power supply!) :
Once the three slot screws on the outer housing behind the threaded ring are removed ( two of them visible on this drawing) you push the connector forward, out of the aluminum housing. There are no additional screws or clamps, and your connector picture shows that the cable's strain relief is already off. All it takes is pushing and pulling.
Once the three slot screws on the outer housing behind the threaded ring are removed ( two of them visible on this drawing) you push the connector forward, out of the aluminum housing. There are no additional screws or clamps, and your connector picture shows that the cable's strain relief is already off. All it takes is pushing and pulling.
Attachments
Thanks for you replies Ind76 and Klaus!
I was pretty sure they weren't stock connectors. The mic end was easy and just as your description Klaus but the other end is not going any where probably best to put new connectors as these old things are crumbling anyhow.
I'll try to measure the tranny if I get time but I cant promise anything
Cheers
Mark
I was pretty sure they weren't stock connectors. The mic end was easy and just as your description Klaus but the other end is not going any where probably best to put new connectors as these old things are crumbling anyhow.
I'll try to measure the tranny if I get time but I cant promise anything
Cheers
Mark
http://www.digikey.com/catalog/en/partgroup/mil-dtl-26482-series-i-kpse-and-kpt-itt-cannon-llc/7482
Check all images, there are disassembled connectors, maybe somehow it show you how to open it.
If you would find the time it would be great
Check all images, there are disassembled connectors, maybe somehow it show you how to open it.
If you would find the time it would be great
Thanks In76d!! Your Google skills are second to none! ;D
So it appears that the back and front sections screw into each other with the middle section floating so that it can screw into the PSU socket aha!
I can see why the connector is in such bad shape as the only way to open it would be to hold the front section still while turning the back which would be difficult and probably why the connector is in such bad shape... : Hand me the pliers somebody!!no wait!! think about it for a moment... :-\ Just plug it into the psu socket and unscrew the back!!!(Make sure the PSU is off and fully discharged of course!)
I'll try and make time for the Tranny ratio measurement but we have a new baby in the house so time is a tough thing to come buy ATM What is the ratio on your C12a Tranny?
So it appears that the back and front sections screw into each other with the middle section floating so that it can screw into the PSU socket aha!
I can see why the connector is in such bad shape as the only way to open it would be to hold the front section still while turning the back which would be difficult and probably why the connector is in such bad shape... :
Hand me the pliers somebody!!no wait!! think about it for a moment... :-\ Just plug it into the psu socket and unscrew the back!!!(Make sure the PSU is off and fully discharged of course!)I'll try and make time for the Tranny ratio measurement but we have a new baby in the house so time is a tough thing to come buy ATM
What is the ratio on your C12a Tranny?I just noticed that on the pic is inscription 10-6 - just simple added itt cannon and google graphics made rest of the job
Personally i don't have any. I repaired three, at least 8 years ago, and then i didn't think about measuring transformer.
After few years i relaized that it could be some fun to build something with nuvistor but these transformers ratios are some mystery - there was few questions about it, on several forums, but noone ever gived the numbers
I also tried to get informations from AKG, but also without luck.
Personally i don't have any. I repaired three, at least 8 years ago, and then i didn't think about measuring transformer.
After few years i relaized that it could be some fun to build something with nuvistor but these transformers ratios are some mystery - there was few questions about it, on several forums, but noone ever gived the numbers
I also tried to get informations from AKG, but also without luck.
It seems the source of the noise and low output was a bad transformer :-[ I swapped in a 5:1 from a Chinese cathode follower or ccda amp which fixed it but I haven't checked the output impedance so I'm still not sure if it's an appropriate ratio.
So it looks like
I'm in the same boat as you In76d
Maybe Klaus or anyone else will with the answer will chime in as to the ratio? Or even if anyone makes a replacement or rewind?
I know Ami has a low ratio tranny with a similar form that they used in their Lucas cs1 mic they also sell the T11 for china cathode output type mics. http://www.tab-funkenwerk.com/id113.html
might be the go??
So it looks like
I'm in the same boat as you In76d
Maybe Klaus or anyone else will with the answer will chime in as to the ratio? Or even if anyone makes a replacement or rewind?
I know Ami has a low ratio tranny with a similar form that they used in their Lucas cs1 mic they also sell the T11 for china cathode output type mics. http://www.tab-funkenwerk.com/id113.html
might be the go??
Ooo...
Bad...
If it isn't burnt, maybe you could try to resolder it?
Does the board looks like someone before tried to resolder it?
I had C451 which had low output. Previous owner tried to resolder broken winding, and he did, but insulation of the wire wasn't melted enough to make proper connection. C12A transformer (U11) looks similar.
If there's no chance to use it again, i would try first contact with AKG - rather directly not by local distributor.
There is probability that they can have it still in stock.
Bad...
If it isn't burnt, maybe you could try to resolder it?
Does the board looks like someone before tried to resolder it?
I had C451 which had low output. Previous owner tried to resolder broken winding, and he did, but insulation of the wire wasn't melted enough to make proper connection. C12A transformer (U11) looks similar.
If there's no chance to use it again, i would try first contact with AKG - rather directly not by local distributor.
There is probability that they can have it still in stock.
Originally these were also glued as in many others AKG mikes like C414 or C451 etc.
If the windings six aren't broken there's a chance. Please remember that U11 also have 50ohm windings
For akg contact i would go directly to:
[email protected]
If the windings six aren't broken there's a chance. Please remember that U11 also have 50ohm windings
For akg contact i would go directly to:
[email protected]
You really had a luck
Great info, still we don't know the ratio (or do i missed something?), but maybe someone is able to calculate it somehow by number of turns, wire gauge etc.? Transformers "internals" aren't my interest
Did you tried something with original tranny?
For quick i would start to clean wires, take of insulations, put new tin and even try to measure resistance for beginning.
Great info, still we don't know the ratio (or do i missed something?), but maybe someone is able to calculate it somehow by number of turns, wire gauge etc.? Transformers "internals" aren't my interest
Did you tried something with original tranny?
For quick i would start to clean wires, take of insulations, put new tin and even try to measure resistance for beginning.
I just spoke to Dennis at Ami who offered to rewind it for $80.00 USD! He said the ratio is 1:1.8 but would need to checkout the winding style to determine the inductance. I'm pretty sure the secondary is cooked as there was no insulation on any of the wiring in the cable and a wire had broken off... I'll check once I get it out of the mic. fun fun :
He said the ratio is 1:1.8 but would need to checkout the winding style to determine the inductance. I'm pretty sure the secondary is cooked as there was no insulation on any of the wiring in the cable and a wire had broken off... I'll check once I get it out of the mic. fun fun : Not sure that "1:1.8" (rather 1.8:1) isn't too low.
Inductance is stated in the technical data 17H/1H+1H.
Anyway low ratio could be possible, then here also could fit U35 from 414/451.
If am not wrong size is the same and ratio really similar (around 2:1).
I know that later version from C414 P48 (U54) was still available not so long time ago so maybe U35 is also (it was used in many models).
Dig up a little in original tranny If broken, you have nothing left to lose
If the broken is outside turn you should be able to unwind it a little.
Rather you will not see any insulation leftovers, wire only is coated with thin layer.
Inductance is stated in the technical data 17H/1H+1H.
Anyway low ratio could be possible, then here also could fit U35 from 414/451.
If am not wrong size is the same and ratio really similar (around 2:1).
I know that later version from C414 P48 (U54) was still available not so long time ago so maybe U35 is also (it was used in many models).
Dig up a little in original tranny
If broken, you have nothing left to lose If the broken is outside turn you should be able to unwind it a little.
Rather you will not see any insulation leftovers, wire only is coated with thin layer.
