Sorry abt that, forgot to turn html off :)
I found this interesting on the subject:
http://audiokarma.org/forums/index.php?threads/double-transistor-2sa798-is-there-a-replacement.281614/page-5---
Greetings,
9-0-9
On 2018-03-02 13:05, backshall1@bellsouth.net [PolySix] wrote:
> It looks like you attempted to attach a .gif image but it was blocked.
> I assume you are talking about the 5-pin 2SA798. This is a dual
> transistor which the big parts stores don't have in stock anymore but
> there are a few smaller places that have them, at bigger prices. You
> can usually find them on Ebay. I don't know of any other part that is a
> direct replacement.
> Don B.
>
> FROM: 9-0-9 ninonine@xs4all.nl [PolySix]
> SENT: Friday, March 2, 2018 4:54 AM
> TO: PolySix@yahoogroups.com
> SUBJECT: Re: [PolySix] Re: P6 MG Oddity [1 Attachment]
>
> Hello everyone,
>
> Regarding to this subject, thank you all for contributing, i'm also
> still dealing with a restored polysix having MG issues wich i will
> describe here later, after i have checked all the common bugs with
> jed's replacement pcb connectors cables mod wheel and ic's. For now i
> just have a question regarding that strange transistor with four pins.
> What possible replacement option is available for this (i assume)
> nowadays obsolete part ?
>
> Thanks in advance.
>
> ---
> Greetings,
>
> 9-0-9
>
> On 2018-03-01 19:15, jimpster@me.com [PolySix] wrote:
>
>> Thank you Nekoma, not bad English at all. Yes the cable socket
>> connectors on the board do look like they were transplanted, it is
>> something to consider.
>
>