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R2200B transistor LV power suppply

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xxx2fan
Posts: 64
Joined: Mon Oct 31, 2005 4:42 pm
What radios do you own?: HT750 Ht1250 CDM1250 CDM1550

R2200B transistor LV power suppply

Postby xxx2fan » Tue Aug 01, 2017 5:40 pm

Does anyone know a replacement for transistor M9706 48-869706, I've looked and looked and cannot find anything to cross it to and can't find one anywhere.. Sure would like some help if someone knows what would work in its place. Also am looking for M9648 replacement think a NTE 128 might work in it's place not sure though.
Thanks for any help

xxx2fan
Posts: 64
Joined: Mon Oct 31, 2005 4:42 pm
What radios do you own?: HT750 Ht1250 CDM1250 CDM1550

Re: R2200B transistor LV power suppply

Postby xxx2fan » Wed Aug 02, 2017 3:32 pm

Anyone that needs 48-869706 cross reference I finally found a place on the net that has many of the 48-xxxxxxxx cross if any needs thought I would share the web site.

https://www.mikesarcade.com/cgi-bin/spi ... OSSREF.txt

xxx2fan
Posts: 64
Joined: Mon Oct 31, 2005 4:42 pm
What radios do you own?: HT750 Ht1250 CDM1250 CDM1550

Re: R2200B transistor LV power suppply

Postby xxx2fan » Thu Aug 03, 2017 5:43 pm

Going at this one more time. After doing bunches of looking the M9706 says it converts to MJE370, but that is a PNP, so the comparable is MJE520 which is Darlington NPN. That converts to a ECG 184 in the old ECG book I have.
Hope someone gets some help out of this. its a to126 case vice To92 but I have fingers crossed it with bring the LV power supply back to life in the R2200 service monitor. I ordered 25 of the MJE520....... it's been like pulling teeth. LOL

Thanks for help.

Audiotron
New User
Posts: 43
Joined: Wed Apr 05, 2017 5:51 am

Re: R2200B transistor LV power suppply

Postby Audiotron » Sun Aug 06, 2017 7:17 am

M9706 would use BD679 , Already the M9648 I consider a little critical depending on his position on the board would try a 2n3904 and monitor the result..

Hugs from Brazil ....

xxx2fan
Posts: 64
Joined: Mon Oct 31, 2005 4:42 pm
What radios do you own?: HT750 Ht1250 CDM1250 CDM1550

Re: R2200B transistor LV power suppply

Postby xxx2fan » Wed Aug 09, 2017 2:01 am

Auditron
Thanks for your input I'll consider the 2n3904 for the m9648 slot have some on the way, if you have any other ideas all will be considered.
Awesome the internet, all the way from Brazil and we can share info Thanks again

Audiotron
New User
Posts: 43
Joined: Wed Apr 05, 2017 5:51 am

Re: R2200B transistor LV power suppply

Postby Audiotron » Fri Aug 11, 2017 8:05 am

Hello My Friend, [
if you can give me the position where they are on the board, I can help you with greater precision

Hugs from Brazil


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