Edcor OPT's

bloozestringer · 28th December 2006, 02:59 AM

I was wondering if anyone has had any trouble with the cheaper $18 Edcor OPT's as far as noise and the wiring connections are concerned? Since the primary and secondary taps are all on the same side how is the best way to minimize any noise issues?

Thanks in advance.

dsavitsk · 28th December 2006, 03:24 AM

Just be sure the power transforner is turned 90 degrees and the grounding is to a star, and you won't have any problems.

bloozestringer · 28th December 2006, 03:31 AM

Planned on that. In fact the PT will be at one end and the OPT's at the other similar to Audiotropics Machine. It just seems like there would be less problems by bringing in the B+ on one side of the transformer, while the output would be on the other near side near the edge of the chassis. I'm going to have to cross the secondaries at some point with the B+ I think.

tubelab.com · 28th December 2006, 03:44 AM

Haven't got to your e-mail yet. I have been either chained to my computer at work, or traveling 500 miles 6 out of the last 8 weekends to move my mother into assisted living. I got about 200 e-mails to answer.

I have had no issues wiring up the Edcors with out paying much attention to routing the wires. I have even connected them up with clip leads (don't do this at home). The signal levels are very high at this point, so noise pickup is not an issue. Just make sure any low level wiring (like the input connections) does not come near the transformers, and as stated before, make sure the power transformer is rotated 90 degrees from the OPT's. I just wish that Edcor would have put the primary leads (high voltage) on the bottom. It would make them harder to accidentally touch. Put heat shrink on the leads.

bloozestringer · 28th December 2006, 03:38 PM

Thanks a lot. I understand about the not having time thing. I think I might put ventilated boxes over them just because of the location of the primary connections.

sorenj07 · 28th December 2006, 03:50 PM

would it at all be worthwhile to try to take off the mounting bracket and pot these things? the only thing that worries me is heat dissipation.

Zibi · 28th December 2006, 04:26 PM

Quote:

Originally posted by sorenj07
would it at all be worthwhile to try to take off the mounting bracket and pot these things? the only thing that worries me is heat dissipation.

Don't worry, solids have the highest heat conductivity.
http://www.clavius.org/heatxfer.html

sorenj07 · 28th December 2006, 05:51 PM

Wow. That's kind of weird because on Angela's website, they have the following statement:

Please note, potting these transformers is not recommended and will void the warranty. Mark Mercer of Hammond writes ..."due to the design, our transformers will not last very long if they are potted. The design calls for air-cooling. By potting you trap the core and build up too much heat."

Admittedly it's about hammond's line of 2xx-series power transformers but still. Maybe an email to the Edcor could settle this?

Zibi · 28th December 2006, 06:03 PM

Quote:

Originally posted by sorenj07
Wow. That's kind of weird because on Angela's website ...

Rather physics.

sorenj07 · 28th December 2006, 07:59 PM

OK! time for me to start searching this forum about DIY potting. I don't have any fancy vacuum pump equipment but I have to admit, the aesthetics of those open-reel OPT's were most of the deterrence I had from buying them.

28th December 2006, 02:59 AM	#1
bloozestringer diyAudio Member Join Date: May 2005 Location: Amarillo, TX	Edcor OPT's I was wondering if anyone has had any trouble with the cheaper $18 Edcor OPT's as far as noise and the wiring connections are concerned? Since the primary and secondary taps are all on the same side how is the best way to minimize any noise issues? Thanks in advance.

28th December 2006, 03:44 AM	#4
tubelab.com diyAudio Member Join Date: Jul 2005 Location: South Florida	Haven't got to your e-mail yet. I have been either chained to my computer at work, or traveling 500 miles 6 out of the last 8 weekends to move my mother into assisted living. I got about 200 e-mails to answer. I have had no issues wiring up the Edcors with out paying much attention to routing the wires. I have even connected them up with clip leads (don't do this at home). The signal levels are very high at this point, so noise pickup is not an issue. Just make sure any low level wiring (like the input connections) does not come near the transformers, and as stated before, make sure the power transformer is rotated 90 degrees from the OPT's. I just wish that Edcor would have put the primary leads (high voltage) on the bottom. It would make them harder to accidentally touch. Put heat shrink on the leads. __________________ Too much power is almost enough! Turn it up till it explodes - then back up just a little.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Anyone used a edcor cxpp100-ms-5k OT	nhuwar	Tubes / Valves	4	8th April 2009 05:51 PM
Edcor Site Down? Gone? anyone know anything?	Trout	Tubes / Valves	4	6th April 2009 10:36 PM
Edcor OPT's w/ SimpleSE	awhite1159	Tubes / Valves	52	29th September 2007 03:00 PM
Edcor In SE Guitar Amp	Trout	Tubes / Valves	9	14th September 2007 11:59 PM
Edcor outputs?	kegger	Tubes / Valves	4	3rd February 2007 05:35 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

28th December 2006, 03:24 AM	#2
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	Just be sure the power transforner is turned 90 degrees and the grounding is to a star, and you won't have any problems.

28th December 2006, 03:31 AM	#3
bloozestringer diyAudio Member Join Date: May 2005 Location: Amarillo, TX	Planned on that. In fact the PT will be at one end and the OPT's at the other similar to Audiotropics Machine. It just seems like there would be less problems by bringing in the B+ on one side of the transformer, while the output would be on the other near side near the edge of the chassis. I'm going to have to cross the secondaries at some point with the B+ I think.

28th December 2006, 03:38 PM	#5
bloozestringer diyAudio Member Join Date: May 2005 Location: Amarillo, TX	Thanks a lot. I understand about the not having time thing. I think I might put ventilated boxes over them just because of the location of the primary connections.

28th December 2006, 03:50 PM	#6
sorenj07 diyAudio Member Join Date: May 2006	would it at all be worthwhile to try to take off the mounting bracket and pot these things? the only thing that worries me is heat dissipation.

28th December 2006, 05:51 PM	#8
sorenj07 diyAudio Member Join Date: May 2006	Wow. That's kind of weird because on Angela's website, they have the following statement: Please note, potting these transformers is not recommended and will void the warranty. Mark Mercer of Hammond writes ..."due to the design, our transformers will not last very long if they are potted. The design calls for air-cooling. By potting you trap the core and build up too much heat." Admittedly it's about hammond's line of 2xx-series power transformers but still. Maybe an email to the Edcor could settle this?

28th December 2006, 07:59 PM	#10
sorenj07 diyAudio Member Join Date: May 2006	OK! time for me to start searching this forum about DIY potting. I don't have any fancy vacuum pump equipment but I have to admit, the aesthetics of those open-reel OPT's were most of the deterrence I had from buying them.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)