Re: what's this symbol in the fairchild 670 diagram?
« Reply #20 on: September 12, 2009, 12:21:17 PM »
Wow!! Nice pic!

Sorry for delay in replying, at the Southampton boat show...

So, I'm not sure what the groupDIY upload thing is?

Is there a link? Or am I being dumb? (few drinks in the sun!)

best
pete


Walrus

Re: what's this symbol in the fairchild 670 diagram?
« Reply #21 on: September 12, 2009, 07:05:26 PM »
Bloody Hell CJ, do you have a time machine? That looks like it was only just made. Our one is slightly more "grubby" inside.....
Kevin.

CJ

Re: what's this symbol in the fairchild 670 diagram?
« Reply #22 on: September 13, 2009, 03:19:06 PM »
 6386 tube data sheet
it has all the load lines included:


http://vacuumbrain.com/The_Lab/Fairchild/670_Pics/6386.pdf

Control Input
UTC 6431










Here is a resistor and partial cap list
Accuracy is not verified from my end.

Fairchild 670

Resistors

6.8     ½  watt   10%  1 ea.
30      ½ watt    1%    4 ea.
33      1 watt     10%  2 ea.
150    ½  watt   10%  8 ea.
180    ½  watt   10%  4 ea.
560    ½  watt   10%  4 ea.
560    1 watt     10%  4 ea.
680    ½  watt   10%  8 ea.
1000  1 watt     10%  5 ea.
2700  1 watt     10%  4 ea.
3900  1 watt     10%  2 ea.
4700  ½  watt   10%  2 ea.
10K   ½  watt   10%  1 ea.
27K   ½  watt   10%  1 ea.
27K   1 watt     10%  1 ea.
47K   ½  watt   10%  4 ea.
68K   ½  watt   10%  2 ea.
100K ½  watt   10%  5 ea.
100K 1 watt     10%  8 ea.
100K 2 watt     10%  4 ea.
150K ½  watt   10%  4 ea.
150K 1 watt     10%  1 ea.
220K ½  watt   10%  2 ea.
270K ½  watt   10%  3 ea.
470K ½  watt   10%  3 ea.
1M    ½  watt   10%  6 ea.

93 Total


Capacitors

20 pf     1 KV          4 ea.
0.05uF  400 VDC   4 ea.
0.1uF    200 VDC   2 ea.
0.1uF    400 VDC   4 ea.

2uF       200 VDC   2 ea.
4uF       150 VDC   2 ea.
4uF       440 VAC   1 ea.   (note:  probably oiled filled)
8uF       150VDC    2 ea.
20uF     150VDC    2 ea.
25uF     25VDC      1 ea.
60uF     450VDC    2 ea.
140uF   350VDC    2 ea.
250uF   50VDC      2 ea.
1000uF 15VDC      1 ea.

C109,C209  ???/200VDC  2 ea.   any help here? I think it’s 0.1
Schematics unclear

35 Total   



« Last Edit: September 18, 2009, 01:04:31 AM by CJ »
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

CJ

Re: what's this symbol in the fairchild 670 diagram?
« Reply #23 on: September 13, 2009, 03:36:55 PM »
Close up of Logo:



yet another inside shot





nice overall shot...
http://vacuumbrain.com/The_Lab/Fairchild/670_Pics/wireing_a.jpg

fun with the 670 cathode current paths



another print, harder to read...

550kb!
http://vacuumbrain.com/The_Lab/Fairchild/670_download.jpg

transformer layout




660>670 inventor
http://vacuumbrain.com/The_Lab/Fairchild/Rein_Narma/Rein_3.jpg

660>670 inventor with slide rule  sf hyatt

http://vacuumbrain.com/The_Lab/Fairchild/Rein_Narma/Rein_2.jpg



« Last Edit: September 18, 2009, 01:33:14 AM by CJ »
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Walrus

Re: what's this symbol in the fairchild 670 diagram?
« Reply #24 on: September 14, 2009, 07:04:20 AM »
The best I can offer is this....
Kevin.

Re: what's this symbol in the fairchild 670 diagram?
« Reply #25 on: September 14, 2009, 08:43:00 AM »
wow! so much 670 porn!!!   ;D

thanks CJ for the diagram.

Pete

Re: what's this symbol in the fairchild 670 diagram?
« Reply #26 on: September 15, 2009, 01:48:24 AM »
got it!

many thanks CJ.
Pete

Re: what's this symbol in the fairchild 670 diagram?
« Reply #27 on: September 17, 2009, 08:23:18 AM »

Thanks again CJ, fantastic help...

 ;)

CJ

Re: what's this symbol in the fairchild 670 diagram?
« Reply #28 on: September 18, 2009, 01:25:51 AM »
bump for the last crop of pics and stuff...

see above...
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Re: what's this symbol in the fairchild 670 diagram?
« Reply #29 on: September 18, 2009, 01:31:04 AM »
thats just lovely man..thanks for taking the time to do this..great pics of Rein too..

 ;)





CJ

Re: what's this symbol in the fairchild 670 diagram? New
« Reply #30 on: September 18, 2009, 02:37:56 AM »
no problem,
and the y-6431 data was hiding in the utc folder,

since the 6386 is now available, the only real tough part is this pesky control input.
here is some stuff on that...

UTC Y-6431

Ratio: 1:9.7 or 600:55,300 ohms @ 1000cps , open circuit
ferq response-10db rise @ 40 kcps

pri-2 ea.=43.21 and 43.34 ohms dcr each-1.05  and 1.04 henries each (Gen-Rad)
capacitance 180 pf from pin 1 to any terminal
D=0.383 (B-K Precision Handheld Bridge)

sec-2 ea. 1.667 and 1.692 k ohms dcr -100 henries ea. (Gen-Rad)
D= 0.157 (B-K)

winding data:

Core: UI31  15/32" stack

S1 red>F3 brn -500 turns #38- 4 Layers
S6 blk>F8 grn  - 4800 turns of #43- 21 Layers
S2>F4 - 500t #38 4L
S5>F7  - 4800t #43 - 21L

1 mil insulation



and the triad if interested...


Fairchild 670 Signal Amp Output = Triad HS 52

255 Turns of #31 

1425 Turnsa of #39

1425 Turns #39

255 Turns #31

50/50 Core 21 EI LAms 1/2 x 7/8 inch stack...
« Last Edit: September 18, 2009, 03:16:28 AM by CJ »
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html


 

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