Mullard E7600/3 (Adapter 10A info needed). - UK Vintage Radio Repair and Restoration Discussion Forum

robot797 · 17th May 2021, 5:39 pm

Hello.

I wanted to use my tester to test a few PL504's today but I can't test them without a 10A adapter. It was supposed to be listed in the E7600 MK4 manual but I can't seem to find it.

Who can help me find a clear drawing of one?

Thanks.

chriswood1900 · 17th May 2021, 6:52 pm

See post #135 in this thread by Ed.
https://www.vintage-radio.net/forum/....php?p=1223253

Quote:

Originally Posted by Ed_Dinning

Hi Folks, attached details of the 10A and 13 adaptors.

From my notes there are references to a 10, 10B, 11 and 12 adaptors, but perhaps these were for early TV tubes before the special adaptors were produced

Note that some adaptors have a male top cap attached. This is usually for boost diodes where the TC is cathode.

Ed

He has drawn it out.

robot797 · 17th May 2021, 7:38 pm

Yes I saw it but somehow I don't understand it.

robot797 · 18th May 2021, 4:25 am

OK. I tried all combinations for only the filament and I did not get any result. I don't know what way to count the pin numbers on the B9D socket.
So filament is connected to either 3-6 or 6-7?

I need more help please.

Station X · 18th May 2021, 9:24 am

Please confine this discussion to this thread.

chriswood1900 · 18th May 2021, 11:22 am

On a PL504 the heater pins are 4 & 5 looking at the base and counting clockwise, Pin 1 is the first one after the gap.
You could try measuring the resistance to check the filament/heater pins 4&5 which will be around 13 to 14 Ohms when cold and help you identify them.
This might help you understand the valve.
http://www.r-type.org/exhib/aaq0265.htm

robot797 · 18th May 2021, 2:32 pm

I know that, but I was talking about the little circuit placed in this thread

Station X · 18th May 2021, 3:04 pm

The circuit shows adaptors ie a male plug, which plugs into the tester, and a female socket which the valve being tested plugs into.

The wiring between plug and socket isn't necessarily straight and a wire to a top cap is included.

robot797 · 18th May 2021, 3:07 pm

I know, that is why I translated the pin 4-5 to the 3-6 or 6-7

Station X · 18th May 2021, 3:17 pm

If you set up the tester to test say a PL504 (heater on pins 4 and 5), which sockets of the IO valve holder on the tester have the heater voltage (27V) on them? Socket pins number anti-clockwise when looking into the socket.

robot797 · 18th May 2021, 3:22 pm

I just tested all the pins
there is 30V between pin 2 and 7 on the tube tester

robot797 · 18th May 2021, 3:24 pm

I am using card 1167 btw
and it sais 10A

Station X · 18th May 2021, 5:00 pm

The diagram is a bit confusing, but as far as I can see:-

Pin 2 of the IO plug is wired to socket 4 of the B9D socket.
Pin 7 of the IO plug is wired to socket 5 of the B9D socket.

Pins number clockwise when looking at the bottom of a valve or viewing a valve holder from under the chassis.
Pins number anti-clockwise when looking into a valve holder from the top of the chassis, or looking at the solder side of a plug.

I hope I got that right. It's easier to visualise it than it is to write it down.

robot797 · 18th May 2021, 6:04 pm

I cant find any way to connect how you say it is
unless I used the 8 pin tester socket as the 9 pin tube socket

could you please draw it out for me

Station X · 18th May 2021, 6:11 pm

You need to make an adaptor consisting of an International Octal Plug and a B9D socket interconnected as per Ed's drawing.

The International Octal plug plugs into the tester and the valve under test plugs into the B9D socket.

robot797 · 18th May 2021, 6:21 pm

Quote:

Originally Posted by Station X

You need to make an adaptor consisting of an International Octal Plug and a B9D socket interconnected as per Ed's drawing.

The International Octal plug plugs into the tester and the valve under test plugs into the B9D socket.

yes I know
and I have both
but I cant make the connections because the drawing just are bad

I have restored the whole tester with minimal help
and I am mad at myself for not being able to make a simple adapter
I mean I have had to make a few other adapters and they all work
but this one I can't get it to work

Station X · 18th May 2021, 7:23 pm

How is your adaptor wired?

robot797 · 18th May 2021, 7:29 pm

I can't wire it because I don't understand the drawing.

PJL · 18th May 2021, 11:17 pm

Attached is the output from my Mullard Tester simulator - it is available in the forum somewhere.

It shows what function each of the pins is being tested as, the corresponding pin number on each of the valve sockets, and the expected voltages. In this case two connections are made for each of the control grid, screen grid and cathode which is not normally the case!

Check the holes in your card match the image in the attachment.

Station X · 18th May 2021, 11:42 pm

That looks pretty straight forward and confirms what I said in post #13.

It isn't difficult to work out the other connections.

For example the screen grids, pins 5 and 6 of the IO, go to pins 6 and 7 on the B9D as per Ed's drawing.

17th May 2021, 7:38 pm	#3
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Re: Mullard E7600/3 (adapter info needed) Yes I saw it but somehow I don't understand it.

18th May 2021, 4:25 am	#4
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Re: Mullard E7600/3 (adapter info needed) OK. I tried all combinations for only the filament and I did not get any result. I don't know what way to count the pin numbers on the B9D socket. So filament is connected to either 3-6 or 6-7? I need more help please.

18th May 2021, 9:24 am	#5
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Mullard E7600/3 (adapter info needed) Please confine this discussion to this thread. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2021, 11:22 am	#6
chriswood1900 Octode Join Date: Jan 2007 Location: Dorridge, West Midlands, UK. Posts: 1,486	Re: Mullard E7600/3 (adapter info needed) On a PL504 the heater pins are 4 & 5 looking at the base and counting clockwise, Pin 1 is the first one after the gap. You could try measuring the resistance to check the filament/heater pins 4&5 which will be around 13 to 14 Ohms when cold and help you identify them. This might help you understand the valve. http://www.r-type.org/exhib/aaq0265.htm __________________ Chris Wood BVWS Member

18th May 2021, 2:32 pm	#7
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Re: Mullard E7600/3 (adapter info needed) I know that, but I was talking about the little circuit placed in this thread

17th May 2021, 5:39 pm	#1
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Mullard E7600/3 (Adapter 10A info needed). Hello. I wanted to use my tester to test a few PL504's today but I can't test them without a 10A adapter. It was supposed to be listed in the E7600 MK4 manual but I can't seem to find it. Who can help me find a clear drawing of one? Thanks.

18th May 2021, 3:04 pm	#8
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Mullard E7600/3 (adapter info needed) The circuit shows adaptors ie a male plug, which plugs into the tester, and a female socket which the valve being tested plugs into. The wiring between plug and socket isn't necessarily straight and a wire to a top cap is included. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2021, 3:07 pm	#9
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Re: Mullard E7600/3 (adapter info needed) I know, that is why I translated the pin 4-5 to the 3-6 or 6-7

18th May 2021, 3:17 pm	#10
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Mullard E7600/3 (adapter info needed) If you set up the tester to test say a PL504 (heater on pins 4 and 5), which sockets of the IO valve holder on the tester have the heater voltage (27V) on them? Socket pins number anti-clockwise when looking into the socket. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2021, 3:22 pm	#11
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Re: Mullard E7600/3 (adapter info needed) I just tested all the pins there is 30V between pin 2 and 7 on the tube tester

18th May 2021, 3:24 pm	#12
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Re: Mullard E7600/3 (adapter info needed) I am using card 1167 btw and it sais 10A

18th May 2021, 5:00 pm	#13
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Mullard E7600/3 (adapter info needed) The diagram is a bit confusing, but as far as I can see:- Pin 2 of the IO plug is wired to socket 4 of the B9D socket. Pin 7 of the IO plug is wired to socket 5 of the B9D socket. Pins number clockwise when looking at the bottom of a valve or viewing a valve holder from under the chassis. Pins number anti-clockwise when looking into a valve holder from the top of the chassis, or looking at the solder side of a plug. I hope I got that right. It's easier to visualise it than it is to write it down. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2021, 6:04 pm	#14
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Re: Mullard E7600/3 (adapter info needed) I cant find any way to connect how you say it is unless I used the 8 pin tester socket as the 9 pin tube socket could you please draw it out for me

18th May 2021, 6:11 pm	#15
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Mullard E7600/3 (adapter info needed) You need to make an adaptor consisting of an International Octal Plug and a B9D socket interconnected as per Ed's drawing. The International Octal plug plugs into the tester and the valve under test plugs into the B9D socket. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2021, 7:23 pm	#17
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Mullard E7600/3 (adapter info needed) How is your adaptor wired? __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2021, 7:29 pm	#18
robot797 Triode Join Date: Dec 2014 Location: Enschede, Overijssel, Netherlands Posts: 24	Re: Mullard E7600/3 (adapter info needed) I can't wire it because I don't understand the drawing.

18th May 2021, 11:17 pm	#19
PJL Dekatron Join Date: Sep 2005 Location: Seaford, East Sussex, UK. Posts: 5,997	Re: Mullard E7600/3 (adapter info needed) Attached is the output from my Mullard Tester simulator - it is available in the forum somewhere. It shows what function each of the pins is being tested as, the corresponding pin number on each of the valve sockets, and the expected voltages. In this case two connections are made for each of the control grid, screen grid and cathode which is not normally the case! Check the holes in your card match the image in the attachment. Attached Thumbnails

18th May 2021, 11:42 pm	#20
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Mullard E7600/3 (adapter info needed) That looks pretty straight forward and confirms what I said in post #13. It isn't difficult to work out the other connections. For example the screen grids, pins 5 and 6 of the IO, go to pins 6 and 7 on the B9D as per Ed's drawing. Attached Thumbnails __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.