Working with manufacturer to repop 9 pin PtoP and PCB Novar bases. What's in question is (as always w/ manufacturing) potential sales. Anyone know of online database that compiles tubes by base style?
Alternate plan is to go thru my B&K 707 tube tester chart & compile list of tubes that test on Novar socket, but this will only cover mainly North American tubes, and miss some of the Euro and / or Russia makes. I'm hoping to find worldwide database.
Jim
Alternate plan is to go thru my B&K 707 tube tester chart & compile list of tubes that test on Novar socket, but this will only cover mainly North American tubes, and miss some of the Euro and / or Russia makes. I'm hoping to find worldwide database.
Jim
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I'm not aware of any European tubes that used novar bases.
Over here (and USSR I think) we used magnoval. Same layout, slightly larger pins. I think I read somewhere the Russian 7868 reissue had the larger pins as well.
Current production Chinese sockets are somewhere in between: novar tubes fall out, magnovals go in only with a hammer. (no kidding!)
If the Chinese don't produce proper sockets, I'd say there is no market for them.
For EL50x experiments I have some salvaged magnoval sockets and for the 7868 tube that I want to try one time I'll just put some (Nixie) pin sleeves on a PCB.
Over here (and USSR I think) we used magnoval. Same layout, slightly larger pins. I think I read somewhere the Russian 7868 reissue had the larger pins as well.
Current production Chinese sockets are somewhere in between: novar tubes fall out, magnovals go in only with a hammer. (no kidding!)
If the Chinese don't produce proper sockets, I'd say there is no market for them.
For EL50x experiments I have some salvaged magnoval sockets and for the 7868 tube that I want to try one time I'll just put some (Nixie) pin sleeves on a PCB.
Got a batch of 12GT5 tubes for good price that will go towards pair of Frazier 106C mono's. Knew I'd have to come up w/ correct sockets (B9E's) before usage. Researched reasonable $ source- didn't find much.. ebay vendors taking advantage..
Undaunted- ordered some Magnovals (B9D's) for cheap:
https://www.tubesandmore.com/products/socket-9-pin-ceramic-magnoval-bottom-or-top-mount
But -GT's slip 'n slide in them, no tension whatsoever. Not "Tubes and More" 's fault- I recognized the design as ChiFi B9D's and had a back up plan...
Previously ordered two ChiFi compactron sockets of same ceramic base look as the B9D's, which were Chifi's also.
Then removed 1.0mm Compactron pins and successfully installed them in B9D bases, replacing their 1.2mm pins- proving that the ceramic molds are same at pin carve outs.
So easy enough, I thought... canvass some of my multi year contacts on AliExpress and propose the 'new' (old) Novar base, complete with directions and pic's of what I did to accomplish- not rocket science. I'm member in good standing on AliExpress, ordering much from them for my repair biz over the years...
But simple as this proven process seems to those contacted so far,,, it seems elusive... whiskey tango foxtrot??
Not giving up just yet, thx to posters here w/ info-
Jim
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There is a list here ...
Radiomuseum B9E tubes
The snag is I am not a member so only see 3 out of the 98.
!
"Btw, what's the diameter of ordinary, standard noval pins?"
Kay-
Novals are 1.0mm pins, but base carve outs are much different-
Jim
Kay-
Novals are 1.0mm pins, but base carve outs are much different-
Will check this out, good info- thx
Jim
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Excellent, Jim. Good luck! Doing something to unlock the use of all those Novar-based NOS catching dust on the shelf.
Yes, thank you! Hence, both noval and novar pins are of the same diameter. Anyway, I've got a respectable bag full of butchered noval bases, mostly of US origin, with the same type of pin contacts. Would have to try if they fit into my Chinese magnoval holders.
Best regards!
I choked the forum table-layout. Does this work for you?
Tubes / semiconductors by category - Base
Selected: Novar, B9E = bigger than Noval, USA 1959
Result: 1 to 98 from 98
Name Maker Year User Usage Type Base Pin-Assigment Charts Photos Characteristic Diagrams Typical Application Circuit Prices Forum-Threads private Collector-Cards Models
EL520 Common typ Radio/TV-r Power/Out Beam Pow Novar, 1 2 3 1 – – –
EL863 Funkwerk E Power/Out Vacuum P Novar, 1 – – – – – –
GESS-6DW4 Common typ Radio/TV-r Power-sup Damper, Novar, – 4 – – – – –
R-DW4 EDI Electr Radio/TV-r Solid St Novar, 1 – 1 – – – –
UA55 British Tu 1947 Radio/TV-r Universal Double T Novar, 2 2 2 1 – F – 1
5BC3 Common typ Radio/TV-r Power-sup Full-Wav Novar, 1 2 2 2 1 – 1
5BC3A Full-Wav Novar, 1 1 1 – – – –
6AY3 Radio/TV-r Power-sup Damper, Novar, 1 13 3 1 2 1 11
6AY3A Half-Wav Novar, 1 – – – – – –
6AY3B Half-Wav Novar, 1 3 3 – – – 1
6BS3A Half-Wav Novar, 1 – 1 – 1 – –
6CH3 Half-Wav Novar, – 1 1 – 1 – –
6CJ3 Half-Wav Novar, 1 5 1 – 1 – –
6CK3 Half-Wav Novar, 1 – 1 – 2 – –
6CL3 Half-Wav Novar, 1 1 1 – 1 – 29
6CM3 Half-Wav Novar, 1 2 1 – 1 1 –
6DL3 Half-Wav Novar, 1 – 1 – 1 F – –
6DN3 Half-Wav Novar, 1 – 1 – 1 – –
6DW4 Common typ Damper, Novar, 1 2 1 1 1 – 94
6DW4A Radio/TV-r Damper, Novar, 1 1 – – – – –
6DW4B Common typ Damper, Novar, 1 11 1 – – 4 2
6GC5 Beam Pow Novar, 1 4 1 1 3 1 –
6GF7 Radio/TV-r Double T Novar, 1 7 2 2 2 – 45
6GF7A Radio/TV-r Double T Novar, 1 5 1 – 3 3 2
6GJ5 Common typ Radio/TV-r Power/Out Beam Pow Novar, 1 4 – 1 2 1 2
6GJ5A Beam Pow Novar, 1 1 1 – 1 – –
6GT5 Radio/TV-r Beam Pow Novar, 1 2 2 1 2 1 4
6GT5A Beam Pow Novar, 1 – 1 – 1 – –
6JB6 Radio/TV-r Power/Out Beam Pow Novar, 1 7 2 1 2 1 14
6JB6A Power/Out Beam Pow Novar, 1 14 1 – 1 – 4
6JE6 Power/Out Beam Pow Novar, 1 1 3 1 1 F – 48
6JE6A Beam Pow Novar, 1 3 3 – 1 F – –
6JE6B General El Radio/TV-r Power/Out Beam Pow Novar, 1 3 – – 1 – –
6JE6C Beam Pow Novar, 1 6 1 – 2 1 2
6JF6 Beam Pow Novar, 1 2 1 – 2 1 –
6JG6A Beam Pow Novar, 1 – 1 – 2 – 1
6JR6 Beam Pow Novar, 1 1 1 – 1 – 2
6JT6A Beam Pow Novar, 1 – 1 – – – –
6JU6 Beam Pow Novar, 1 5 1 – 2 – 2
6KM6 Beam Pow Novar, 1 5 1 – 2 – –
6KV6 Radio/TV-r Power/Out Beam Pow Novar, 1 1 2 – – – –
6KV6A Beam Pow Novar, 1 1 1 – 1 – 1
6KY8A Triode-B Novar, 1 6 1 – 1 – –
6LQ6 Beam Pow Novar, 1 10 1 1 1 1 17
6LR8 Triode-B Novar, 1 3 1 – 1 – –
6MD8 Triple T Novar, 1 2 1 – 1 1 –
6ME6 Beam Pow Novar, 1 3 1 – 2 1 –
6MJ6 Beam Pow Novar, 1 3 1 – – 1 6
6?38? Common typ Vacuum P Novar, – – – – – – –
10GF7A Double T Novar, 1 2 1 1 – – –
12AE7 Radio/TV-r Double T Novar, 1 3 1 1 2 1 2
12AY3A Half-Wav Novar, 1 – 1 – – – –
12BS3A Half-Wav Novar, 1 – 1 – – – –
12CL3 Common typ Radio/TV-r Damper, Novar, 1 1 1 – 1 1 –
12DW4A Half-Wav Novar, 1 – 1 – 1 – –
12GJ5A Beam Pow Novar, 1 – 1 – – – –
12GT5 Beam Pow Novar, 1 1 1 1 1 – –
12GT5A Beam Pow Novar, 1 – – – – – –
12JB6 Radio/TV-r Power/Out Beam Pow Novar, 1 3 – 1 1 – 3
12JB6A Radio/TV-r Power/Out Beam Pow Novar, 1 1 1 – 1 – –
12JT6A Beam Pow Novar, 1 2 1 – 2 – –
12MD8 Triple T Novar, 1 2 1 – 2 – –
13GF7A Double T Novar, 1 1 1 – 1 – –
15KY8A Triode-B Novar, 1 4 1 1 1 – –
17AY3A Half-Wav Novar, 1 1 1 – – 1 –
17BH3 Half-Wav Novar, 2 – – 1 1 – –
17BH3A Half-Wav Novar, 1 – – – – – –
17BS3A Half-Wav Novar, 1 2 1 1 – – –
17DW4 Damper, Novar, – 1 – – – – –
17DW4A Damper, Novar, 1 – 1 – 1 – –
17GJ5A Beam Pow Novar, 1 1 1 – – – –
17GT5A Beam Pow Novar, 1 2 1 – 1 – –
17JB6 Radio/TV-r Power/Out Beam Pow Novar, 1 4 – 1 1 – 1
17JB6A Radio/TV-r Power/Out Beam Pow Novar, 1 1 1 – – – –
17JF6 Beam Pow Novar, 1 1 1 – 1 – –
17JG6A Beam Pow Novar, 1 – 1 – 1 – –
17JR6 Beam Pow Novar, 1 – 1 – – – –
17JT6A Beam Pow Novar, 1 2 1 – 2 – –
17KV6A Beam Pow Novar, 1 3 1 1 1 – –
19DK3 Half-Wav Novar, 1 1 1 – 1 – –
21LR8 Triode-B Novar, 1 3 1 – 1 – –
22BH3 Half-Wav Novar, 1 1 – 1 1 – –
22BH3A Half-Wav Novar, 1 – – – 1 – –
22JF6 Beam Pow Novar, 1 1 1 – 1 – –
22JG6A Beam Pow Novar, 1 – 1 – 1 – –
22JR6 Beam Pow Novar, 1 1 1 – 1 – –
22JU6 Radio/TV-r Power/Out Beam Pow Novar, 1 – 1 1 1 – –
22KM6 Beam Pow Novar, 1 2 1 – 1 – –
22KV6A Beam Pow Novar, 1 2 1 – 1 – –
24JE6C Radio/TV-r Power/Out Beam Pow Novar, 1 2 1 – – – –
24LQ6 Radio/TV-r Power/Out Beam Pow Novar, 1 3 1 – 1 – –
25DL3 Half-Wav Novar, 1 – 1 – – – –
31LQ6 Radio/TV-r Power/Out Beam Pow Novar, 1 3 1 – 1 – 1
31LR8 Triode-B Novar, 1 1 1 – 1 – –
31LZ6 Beam Pow Novar, 1 1 1 – 1 – –
33JR6 Beam Pow Novar, 1 – 1 – 1 – –
36MC6 Beam Pow Novar, 1 1 2 – 1 – –
7868 Common typ Power/Out Beam Pow Novar, 1 16 9 2 4 F – 74
Regardless of what was stamped on their envelope, EL520 surely wasn't common type. The few that ever were manufactured were made at the La Radiotechnique plant (run by Philips) at Chartres, France.
Best regards!
Best regards!
Thanks much PRR ;<)
That post could not have come at better time, as I linked it to RFQ to manufacturer on Alibaba just now.
Did get immediate response of "tomorrow I check". Still TBD is order quantity to amortize start up costs- many applications this list shows hopefully will validate need.
Jim
That post could not have come at better time, as I linked it to RFQ to manufacturer on Alibaba just now.
Did get immediate response of "tomorrow I check". Still TBD is order quantity to amortize start up costs- many applications this list shows hopefully will validate need.
Jim
After combing thru B&K 707 tube chart, found some additions to the Novar list-
6BH3- rectifier
6DK3- rectifier
6LZ6- sweep pentode- data sheet 7/71
6MC6- sweep pentode- data sheet 6/72
6MX8- ?? B&K test procedure indicates has multiple grids
PL500,4,5,8 pentode family- seems congruous w/ 6KW6 design- but not much info available- more depth here?
Other filament versions of above not mentioned for simplicity-
Power pentodes listed were the last of the era, imo.
Still working on Novar base source- to be continued
Jim
6BH3- rectifier
6DK3- rectifier
6LZ6- sweep pentode- data sheet 7/71
6MC6- sweep pentode- data sheet 6/72
6MX8- ?? B&K test procedure indicates has multiple grids
PL500,4,5,8 pentode family- seems congruous w/ 6KW6 design- but not much info available- more depth here?
Other filament versions of above not mentioned for simplicity-
Power pentodes listed were the last of the era, imo.
Still working on Novar base source- to be continued
Jim
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