SM2YER Goran's Homepage

DIY - About making
B9A / Noval
Tube Socket Converters

INDEX

Scope

'General' Making process

6N3 --> 12AX7

6N3 --> ECC808

12AX7 --> ECC808

12V 12AX7 --> 6H1/6H2

6,3V 12AX7 --> 6H1/6H2

Others...

Reference / Links

Disclaimer

Scope
This page is all about making B9A electron tube socket converters.

First i describe the 'general' making process with hints, tools and methods used a.s.o. With this description, the correct tube data (Pinout) and suitable material your able to start making your own converters.

6x socket converters

There is literately no limit what you can do with socket converters, as long as the tubes is electrical equivalent or close to equivalent. The socket converter enables a lot of tubes to be tested where you never tested them before. For instance, i'm now able to test the 6H1/6H2, 6922, 6H23n, 6DJ8 or ECC88 tubes in amplifiers made for 12AX7, ECC83, ECC81, 12AU7 or 12AT7.

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Länk till Foobar2000 FUNDRAISER --> http://mobile.foobar2000.com/

'General' Making process
To make the socket converter you need some tools: Screw driver, Fine tip marking pen, Small to medium pliers, small wire cutter, some tools / needle to manipulate wires when reassembling, soldering tools.

Some tools needed for the build

I start the build using standard 9-pin B9A / Noval 'Socket Saver', in original it's 'hard' wired pin to pin with nine (9) goldplated 17mm pins.

1. Using a screw driver, disassemble the 'socket saver'.

2. Measure and mark the appropriate length (About 10mm) on all the pins.
On the image abowe i use tape to make markings in parallel an all pins.

3. Make the interconnect wires, Needed numbers for each converter type is stated below. The interconnect wires is made with 5-6cm long insulated interconnect wires 0,6-0,7mm²(20-19AWG).
Strip insulation 6-7mm on one end of each wire and pre solder, make 'loop' to fit on socket pin.

4. solder the interconnect wires to pin at 10mm mark, solder to pins stated for each converter type below. I use one 'extra', ceramic (White) B9A tube socket as support when soldering, the 'extra' socket have molded pin numbered in the ceramic, this helps keeping track of pin numbers.

5. Cut away the soldered pins, leave pin as stated for each converter type below.

6. Insert the soldered pins in the holes in the socket cup as stated for each converter type below.

7. When the soldered pins is in place, fixate with 2-component epoxy glue.
(Allow the 2-component epoxy glue to harden for up to four hours)

8. Fan out and trim down the insulated interconnect wires to the needed length.

9. Strip insulation about 3mm and pre solder.

10. Solder insulated interconnect wires according to table below

11. Reassemble

12. Test the ready made socket converter with ohm meter

FINALY! Label your new socket converter, all the different converters looks almost the same, without appropriate labels you will mix them up! - Using the wrong converter might cause damages to your tubes or your amplifier!

NOTE You should Always turn your amplifier off and allow the tubes too cool down for a couple of minutes (ten or more) before making any changes / replacing tubes. Tampering with hot tubes might cause damage to the tubes or you could also burn your hands!

Högupplöst, OnLine!

Högupplöst, OnLine!
Hittade en site i Norge, här ligger en rad nedladdningsbara testfiler i .FLAC och DSD 64/128/256 format (Gratis) - Men däär ligger också en web-shop så att man kan köpa ännu mera höguplöst material. Länk -->http://www.2l.no/hires/

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Marianne Thorsen / TrondheimSolistene Violin Concerto no. 4 in D major KV 218 - Allegro MOZART, stereo, 24 bit, 192 kHz, 4059 kbps rakt av från USB tumme direkt ansluten till RaspberryPi/Raspyfi spelaren, hva en lyd!

6N3 (6H3n) --> 12AX7 (ECC83)
This converter is made for using the 12AX7 / ECC83 double triode in preamp / drive stage designed for Chinese 6N3 or Russian 6H3n.

Provar 12AX7 sockel adapter + MULLARD 12AX7 'Longplate'

1. Disassemble the 'socket saver' (As shown above)
2. Mark the appropriate length on al the pins (As shown above)
3. Make five (5) 5cm insulated interconnect wires (As shown above)
4. solder the interconnect wires to pin 1, 2, 3, 4, and 5
5. Cut away the soldered pins, leave pin 6, 7, 8 and 9
6. Insert the soldered pins in the holes for pin 1, 2, 3, 4, and 5 in the socket cup (As shown above)
7. When the soldered pins is in place, fixate with 2-component epoxy glue (As shown above)
(Allow the 2-component epoxy glue to harden for up to four hours)
8. Trim down the insulated interconnect wires to the needed length (As shown above)
9. Strip insulation about 3mm and pre solder (As shown above)
10. Solder insulated interconnect wires according to table below
11. Reassemble (As shown above)
12. Test the ready made socket converter with ohm meter (As shown above)

Från Pin  -->     Till Pin           Not.
=====================================================================
6N3/6H3n          12Ax7              USAGE
=====================================================================
 1        -->     4+5  (Need Wire)   Filament
 2        -->     3    (Need Wire)   K1
 3        -->     2    (Need Wire)   G1
 4        -->     1    (Need Wire)   A1
 5        -->          (Cut Wire)    Screen
 6        -->     6    (Leave as is) A2
 7        -->     7    (Leave as is) G2
 8        -->     8    (Leave as is)  K2
 9        -->     9    (Leave as is) Filament
=====================================================================

This converter is simple to build, pin 6,7,8,9 is unchanged (Straight pin to pin), pin 1,2,3,4 is wired in reversed order, pin5 on the 6N3 side is leaved out (Not used), finally pin5 on the 12AX7 side is hard wired to pin4. Done!

--> Testing the ECC808 adaptor 'Live' in an 'AUDIOROMY M-828A'

6N3 (6H3n) --> ECC808
This converter is made for using the rare ECC808 double triode in preamp / drive stage designed for Chinese 6N3 or Russian 6H3n.

2x 6N3 --> ECC808 socket converters

1. Disassemble the 'socket saver' (As shown above)
2. Mark the appropriate length on al the pins (As shown above)
3. Make seven (7) 5cm insulated interconnect wires (As shown above)
4. solder the interconnect wires to pin 1, 3, 4, 5, 6, 7 and 9
5. Cut away the soldered pins, leave pin 2 and 8
6. Insert the soldered pins in the holes for pin 1, 3, 4, 5, 6, 7 and 9 in the socket cup (As shown above)
7. When the soldered pins is in place, fixate with 2-component epoxy glue (As shown above)
(Allow the 2-component epoxy glue to harden for up to four hours)
8. Trim down the insulated interconnect wires to the needed length (As shown above)
9. Strip insulation about 3mm and pre solder (As shown above)
10. Solder insulated interconnect wires according to table below
11. Reassemble (As shown above)
12. Test the ready made socket converter with ohm meter (As shown above)

Från Pin  -->     Till Pin           Not.
=====================================================================
6N3/6H3n  -->     ECC808             USAGE
=====================================================================
 1        -->     4    (Need Wire)   Filament
 2        -->     2    (Leave as is) K1
 3        -->     1    (Need Wire)   G1
 4        -->     3    (Need Wire)   A1
 5        -->     6    (Need Wire)   Screen
 6        -->     7    (Need Wire)   A2
 7        -->     9    (Need Wire)   G2
 8        -->     8    (Leave as is) K2
 9        -->     5    (Need Wire)   Filament
=====================================================================

--> Testing the ECC808 adaptor 'Live' in an 'AUDIOROMY M-828A'

Allison Goldfrapp - 'Tales of Us'

Allison Goldfrapp - 'Tales of Us'
Lyssnar just nu mycket på sångerskan / låtskrivaren Allison Goldfrapp (Bath/England) - Goldfrapp har en Melankolisk / melodiös röst som verkligen passar låtarna perfekt, lågmäld, klar och påträngande på ett positivt sätt, rösten liksom 'fastnar' - Låtarna går lite i moll, men är väldigt 'utmålade' och melodiösa / harmoniska på samma gång.

Skivan 'Tales of Us' släpptes 2013. Den tekniska kvaliten är mycket bra, med många riktiga guldkorn. Låtar som sticker ut: Jo, Annabel, Stranger, Thea, Clay m.m. - Denna skivan tål säkert att lyssnas på en hel del!

12AX7 (ECC83) --> ECC808
This converter is made for using the rare ECC808 double triode in preamp / drive stage designed for 12AX7 or ECC83.

2x 12AX7 --> ECC808 socket converters

1. Disassemble the 'socket saver' (As shown above)
2. Mark the appropriate length on al the pins (As shown above)
3. Make seven (7) 5cm insulated interconnect wires (As shown above)
4. solder the interconnect wires to pin 1, 2, 3, 6, 7 and 9
5. Cut away the soldered pins, leave pin 4 and 8, remove pin5 (Not needed)
6. Insert the soldered pins in the holes for pin 1, 2, 3, 6, 7 and 9 in the socket cup (As shown above)
7. When the soldered pins is in place, fixate with 2-component epoxy glue (As shown above)
(Allow the 2-component epoxy glue to harden for up to four hours)
8. Trim down the insulated interconnect wires to the needed length (As shown above)
9. Fan out the wires, strip insulation about 3mm and pre solder (As shown above)
10. Solder insulated interconnect wires according to table below
11. Reassemble (As shown above)
12. Test the ready made socket converter with ohm meter (As shown above)

Från Pin --> Till Pin        Not.
============================================
12Ax7       ECC808           USAGE
============================================
 1    -->   3  (Need Wire)   A1
 2    -->   1  (Need Wire)   G1
 3    -->   2  (Need Wire)   K1
 4    -->   4  (Leave as is) Filament
 5 (Remove) 5                Filament
 6    -->   7  (Need Wire)   A2
 7    -->   9  (Need Wire)   G2
 8    -->   8  (Leave as is) K2
 9    -->   5  (Need Wire)   Filamnet Common
============================================

--> Testing the 12AX7 to ECC808 converter 'Live' in an 'YAQIN MC-10L'

Milt Jacksson SUNFLOWER

Milt Jacksson SUNFLOWER
Har adderat ett par CD titlar till samlingen men glömt att uppdatera sidan, senaste tillskottet är Milt Jackson 'SUNFLOWER' - Här hittar man bl.a. en väldigt bra live version av 'For Someone I Love' - Bra teknisk kvalite med bra dynamik.

1. For Someone I Love
2. What Are You Doing the Rest of Your Life?
3. People Make the World Go Round
4. Sunflower
5. SKJ

2x 12V 12AX7 (ECC83) --> 2x 6,3V 6H1n / 6H2n
This converter pair is made for using two Russian 6H1n / 6H2n with 6,3V filament to replace a pair of 12AX7 / ECC83 using 12,6V filament on pin4/5

The idea is to route the 12,6V filament on pin4/5 on one socket in series to both the 6H1n / 6H2n tubes, giving the needed 6,3V voltage drop over each tube.