WTB: Small qty. TO-3P insulators (US only)

sonidos · 12th June 2009, 05:19 PM

Folks, if anyone here in the US has extra TO-3P mica or sil-pad insulators, can you spare 5 pcs? This is about the last thing I need to repair my Adcom amp. Hopefully, someone has extras floating around.

Let me know how much coin to have you part with a few extras in your toolbox.

Thanks!!

Magura · 13th June 2009, 08:20 AM

Hmm, are you sure you don't confuse TO-3P for TO-3 ?

All the Adcom amps I've seen so far, has TO-3 devices.

Magura

infinia · 13th June 2009, 12:11 PM

Quote:

Originally posted by Magura

All the Adcom amps I've seen so far, has TO-3 devices.

Just the big ones. The smaller ones use plastic outputs.

sonidos · 13th June 2009, 02:45 PM

Hi Magura,

infinia is correct. I have the Adcom GFA-535. It uses Sanyo 2SD1047 and 2SB817. I appreciate both of you responding. Per the datasheet, TO-3P. The insulators are last on my list....should have checked them more closely after I removed the originals. I ripped a couple so I I'm a couple short.

infinia · 13th June 2009, 03:04 PM

Quote:

Originally posted by sonidos
Hi Magura,

infinia is correct. I have the Adcom GFA-535. It uses Sanyo 2SD1047 and 2SB817. I appreciate both of you responding. Per the datasheet, TO-3P. The insulators are last on my list....should have checked them more closely after I removed the originals. I ripped a couple so I I'm a couple short.

Hi I have both 535 and 555 series1 !
What are u using for outputs I assume you repaired/replaced. Perhaps a phone call to some local distributor... if nice they can mail you a few.

sonidos · 13th June 2009, 04:31 PM

Hi infinia,

I actually designed a new psu board, which kicked all this off. I goofed on the right channel and blew out a couple of transistors. I sourced the same transistors from B & D Enterprises. They have a good collection of Sanyo trannies.

Fortunately, my left channel works and sounds even better. I upped capacitance with Panasonic TS-HAs, put in a pair of rectifiers that have better current capability, removed the wiring to the LED indicators, and replaced many of the resistors in the signal chain with Vishay Dales. Also, the soldering job was horrendous on the boards and I realigned all the pins on the output trannies and cleaned it all up. The left channel sounds like a whole different beast.

I found a seller on ebay from Hong Kong, so today I put in my order. It will take about 2 weeks but he was much cheaper than distributors. He's got a high rating of 99.9% so hopefully I don't run into trouble with the sil-pads he sold me.

PH104 · 13th June 2009, 05:11 PM

sonidos --

I just saw this thread. Sorry I didn't notice it before. You can buy TO-3P pads, both mica and sil-pads, from Mouser in Mansfield TX. The mica insulators are a dime or so, sil-pads more expensive but you can buy either in onesies.

I can find the parts numbers if your eBay buy doesn't work out.

sonidos · 13th June 2009, 05:19 PM

Hi PH104,

Yes, big help if you know the Mouser #'s. I wasn't sure which ones they carry that will work. The Keystone mica insulators seemed close but I wasn't sure. If you could help me with the guesswork, much appreciated.

PH104 · 13th June 2009, 05:32 PM

It turns out I got the sil-pads from Digi-Key but they will also sell small quantities. It's Digi-Key BER120-ND. The size is 1" x 0.75" for a TO-247 but should work with TO-3P.

The Mouser micas (534-4661) are 1.5" x 1".

sonidos · 13th June 2009, 05:51 PM

Great! That just save me a ton of time researching. Many thanks!

12th June 2009, 05:19 PM	#1
sonidos diyAudio Member Join Date: Jul 2007 Location: Round Rock, TX	WTB: Small qty. TO-3P insulators (US only) Folks, if anyone here in the US has extra TO-3P mica or sil-pad insulators, can you spare 5 pcs? This is about the last thing I need to repair my Adcom amp. Hopefully, someone has extras floating around. Let me know how much coin to have you part with a few extras in your toolbox. Thanks!!

13th June 2009, 08:20 AM	#2
Magura diyAudio Member Join Date: Oct 2003 Location: Denmark, Viborg	Hmm, are you sure you don't confuse TO-3P for TO-3 ? All the Adcom amps I've seen so far, has TO-3 devices. Magura __________________ Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com

13th June 2009, 05:11 PM	#7
PH104 diyAudio Member Join Date: Nov 2001 Location: New Mexico	sonidos -- I just saw this thread. Sorry I didn't notice it before. You can buy TO-3P pads, both mica and sil-pads, from Mouser in Mansfield TX. The mica insulators are a dime or so, sil-pads more expensive but you can buy either in onesies. I can find the parts numbers if your eBay buy doesn't work out. __________________ "When I read about the evils of drinking, I gave up reading." -- Henny Youngman

13th June 2009, 05:19 PM	#8
sonidos diyAudio Member Join Date: Jul 2007 Location: Round Rock, TX	Mouser #s Hi PH104, Yes, big help if you know the Mouser #'s. I wasn't sure which ones they carry that will work. The Keystone mica insulators seemed close but I wasn't sure. If you could help me with the guesswork, much appreciated.

13th June 2009, 05:32 PM	#9
PH104 diyAudio Member Join Date: Nov 2001 Location: New Mexico	It turns out I got the sil-pads from Digi-Key but they will also sell small quantities. It's Digi-Key BER120-ND. The size is 1" x 0.75" for a TO-247 but should work with TO-3P. The Mouser micas (534-4661) are 1.5" x 1". __________________ "When I read about the evils of drinking, I gave up reading." -- Henny Youngman


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13th June 2009, 02:45 PM	#4
sonidos diyAudio Member Join Date: Jul 2007 Location: Round Rock, TX	Hi Magura, infinia is correct. I have the Adcom GFA-535. It uses Sanyo 2SD1047 and 2SB817. I appreciate both of you responding. Per the datasheet, TO-3P. The insulators are last on my list....should have checked them more closely after I removed the originals. I ripped a couple so I I'm a couple short.

13th June 2009, 04:31 PM	#6
sonidos diyAudio Member Join Date: Jul 2007 Location: Round Rock, TX	Hi infinia, I actually designed a new psu board, which kicked all this off. I goofed on the right channel and blew out a couple of transistors. I sourced the same transistors from B & D Enterprises. They have a good collection of Sanyo trannies. Fortunately, my left channel works and sounds even better. I upped capacitance with Panasonic TS-HAs, put in a pair of rectifiers that have better current capability, removed the wiring to the LED indicators, and replaced many of the resistors in the signal chain with Vishay Dales. Also, the soldering job was horrendous on the boards and I realigned all the pins on the output trannies and cleaned it all up. The left channel sounds like a whole different beast. I found a seller on ebay from Hong Kong, so today I put in my order. It will take about 2 weeks but he was much cheaper than distributors. He's got a high rating of 99.9% so hopefully I don't run into trouble with the sil-pads he sold me.

13th June 2009, 05:51 PM	#10
sonidos diyAudio Member Join Date: Jul 2007 Location: Round Rock, TX	Great! That just save me a ton of time researching. Many thanks!

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