3 series board identification

[millsandboon]

Hi all sorry but my eyes are poor and the knowledge isn’t there

Can someone identify these 323 issue 2 boards for me as in S K etc

No stickers on but I’ve included some pics

Thanks in advance

M

[RichardPW]

The 470 ohm input loading resistor suggests to me they are “S” boards

[millsandboon]

Wow you’ve got good eyes lol

I’ve got a set of K boards in my 62 so I’ll be able to swap around before I decide which of the 32.5 and 62 I’m keeping

Thanks

Michael

[Gazza]

Perhaps @Richard.Dane can confirm.

[Richard.Dane]

They do indeed look like NA323S boards.

[millsandboon]

Thanks for your time

M

[RichardPW]

Your 2nd photo showed the relevant resistor and the value is read by the coloured bands, a 470 ohm being yellow, violet, brown.

I think the input capacitor behind it is marked 6n8 or 6800pF which would be correct for an S board.

On a K board the resistor is 560 ohm - green, blue, brown. Can’t remember what the capacitor would be!

The boards have also been serviced recently, evidenced by the blue Samwha capacitors.

[millsandboon]

Yes the amp as a whole was done by Darren

He’s also done my 62K

Hicap

250 in the last month

And then he broke my heart and confirmed my Nat101/snaps was dead