RCA 65372 and CV109 output transistors replacement

WolfgangL · 21st October 2006, 12:55 PM

Hello
iam looking for
RCA 65372 (npn- darlington ?) and
CV109 (pnp ?)replacement
thanks for your help
cannot find any info in the www
Wolfgang

Ian Millar · 1st September 2007, 04:11 AM

My Cerwin Vega A3000-I came with RCA 65372 output transistors (28 of them) and many have been replaced with Motorola MJ15024 which are easy to find. I have recently replaced all of the transistors with new MJ15024 and have 12 good used ones left over if anyone would like them. I also have 13 good used 65372 if anyone would like these. Cheers, Ian

Ian Millar · 10th September 2007, 12:12 PM

OH. Do not buy Motorola T03 transistors on ebay. They are ALL counterfeit products from Asia and will fail FAST. The sellers should be stuck off but try telling ebay that! The easiest give-away is the date codes. The last year of production was 1998 before manufacture went to ON Semiconductor so after that they are marked with ON and not the Motorola logo. Date codes were eg 9731 meaning 31st week of 1997, so if you see the motorola logo and any date code like 0220 they are rubbish fakes. Also they should say MEX and not MEXICO on them and should not have a little circle on the back.
Cheers,
Ian

Vinood · 19th January 2008, 07:25 AM

Hi Ian,
Are you willing to sell the 13 65372's, I have a cerwin Vega A-1800 and in am in need to 11. I believe they were the originals.

Someone rebuilt the amp and used mixed transistors of NTE 280, 109 and 65372 on both channels. needless to say both channels perform differently and one actually distorts at just 50 w RMS.

Please let me know
thanks
Vin

Ian Millar · 19th January 2008, 08:02 AM

Well, it has been ages since I posted the above and have used some of the transistors. I will have a look in my box and see how many I can find and test them. I tried to email you through this forum, but apparently you are not accepting emails via it. I am not going to post my email address up here, so you can send me your email address in a message if you like.
Ian

Ian Millar · 23rd January 2008, 01:17 AM

OK Vinood, I have found the transistors. There were only 8 left (I used 4 of them as drivers in my 3000-I) but one tested bad so I threw it in the bin. The 7 good ones are marked 65372 RCA C 7704 (4th month of 1977 I presume). I also have 13 (presumably good but would have to test) GENUINE MJ 15024 (11 Motorola with 1986 date codes, 1 marked GE/RCA and 1 unknown but marked C9014). These are a drop-in replacement for the 65372 but have a 250V rating as against the 100V rating of the RCA ones. All were pulled from my 3000-I. I had a mixture of these in the 3000-I and both channels sounded the same. What ever you do with that 1800-I, do not turn the two outboard thumbwheels on the driver boards! Also, be very careful with the DC-offset thumbwheel and the bias adjust thumbwheel unless you have a variac. 7 RCA transistors will be $70 (USD) plus postage. Each MJ15024 $5. Cheers, Ian

Ian Millar · 18th February 2008, 07:56 AM

Vinood, I'll take it that you are not in the market then. I try to help but as soon as a price is mentioned - silence.
Cheers,
Ian

Vinood · 9th October 2010, 06:37 AM

Hi Ian,
Sorry but i dumped the Cervin Vega for a Crown CE2000 just after my post and never checked. Hope all is well and thenks for the help
Vin

21st October 2006, 12:55 PM	#1
WolfgangL diyAudio Member Join Date: Jul 2004 Location: Nürnberg	RCA 65372 and CV109 output transistors replacement Hello iam looking for RCA 65372 (npn- darlington ?) and CV109 (pnp ?)replacement thanks for your help cannot find any info in the www Wolfgang

19th January 2008, 07:25 AM	#4
Vinood diyAudio Member Join Date: Jan 2008	65372's Hi Ian, Are you willing to sell the 13 65372's, I have a cerwin Vega A-1800 and in am in need to 11. I believe they were the originals. Someone rebuilt the amp and used mixed transistors of NTE 280, 109 and 65372 on both channels. needless to say both channels perform differently and one actually distorts at just 50 w RMS. Please let me know thanks Vin

19th January 2008, 08:02 AM	#5
Ian Millar diyAudio Member Join Date: Sep 2007 Location: Australia	RCA transistors Well, it has been ages since I posted the above and have used some of the transistors. I will have a look in my box and see how many I can find and test them. I tried to email you through this forum, but apparently you are not accepting emails via it. I am not going to post my email address up here, so you can send me your email address in a message if you like. Ian

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
Replacement output transistors and varistor	dynasor	Solid State	9	5th November 2011 08:21 PM
Transistors replacement	funky2x	Solid State	1	26th July 2008 12:20 AM
Replacement transistors	vyju	Parts	3	2nd February 2008 07:08 PM
please recommend replacement transistors	miekedmr	Solid State	2	6th June 2005 06:54 AM
Replacement transistors for leach amp	Bosium	Solid State	12	13th June 2003 09:07 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

1st September 2007, 04:11 AM	#2
Ian Millar diyAudio Member Join Date: Sep 2007 Location: Australia	My Cerwin Vega A3000-I came with RCA 65372 output transistors (28 of them) and many have been replaced with Motorola MJ15024 which are easy to find. I have recently replaced all of the transistors with new MJ15024 and have 12 good used ones left over if anyone would like them. I also have 13 good used 65372 if anyone would like these. Cheers, Ian

10th September 2007, 12:12 PM	#3
Ian Millar diyAudio Member Join Date: Sep 2007 Location: Australia	OH. Do not buy Motorola T03 transistors on ebay. They are ALL counterfeit products from Asia and will fail FAST. The sellers should be stuck off but try telling ebay that! The easiest give-away is the date codes. The last year of production was 1998 before manufacture went to ON Semiconductor so after that they are marked with ON and not the Motorola logo. Date codes were eg 9731 meaning 31st week of 1997, so if you see the motorola logo and any date code like 0220 they are rubbish fakes. Also they should say MEX and not MEXICO on them and should not have a little circle on the back. Cheers, Ian

23rd January 2008, 01:17 AM	#6
Ian Millar diyAudio Member Join Date: Sep 2007 Location: Australia	OK Vinood, I have found the transistors. There were only 8 left (I used 4 of them as drivers in my 3000-I) but one tested bad so I threw it in the bin. The 7 good ones are marked 65372 RCA C 7704 (4th month of 1977 I presume). I also have 13 (presumably good but would have to test) GENUINE MJ 15024 (11 Motorola with 1986 date codes, 1 marked GE/RCA and 1 unknown but marked C9014). These are a drop-in replacement for the 65372 but have a 250V rating as against the 100V rating of the RCA ones. All were pulled from my 3000-I. I had a mixture of these in the 3000-I and both channels sounded the same. What ever you do with that 1800-I, do not turn the two outboard thumbwheels on the driver boards! Also, be very careful with the DC-offset thumbwheel and the bias adjust thumbwheel unless you have a variac. 7 RCA transistors will be $70 (USD) plus postage. Each MJ15024 $5. Cheers, Ian

18th February 2008, 07:56 AM	#7
Ian Millar diyAudio Member Join Date: Sep 2007 Location: Australia	Vinood, I'll take it that you are not in the market then. I try to help but as soon as a price is mentioned - silence. Cheers, Ian

9th October 2010, 06:37 AM	#8
Vinood diyAudio Member Join Date: Jan 2008	Hi Ian, Sorry but i dumped the Cervin Vega for a Crown CE2000 just after my post and never checked. Hope all is well and thenks for the help Vin

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

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