Express, Liverpool, Rocket, Dirty Little Monster, etc.
Moderators: pompeiisneaks , Colossal
Noel Grassy
Posts: 426 Joined: Thu Feb 09, 2006 5:29 amLocation: Vacuum Tube Valley-Cali
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by Noel Grassy Fri Oct 03, 2008 10:14 pm
OH, cool.
rhinson,
Thanks for reminding me I'm building the 60.
Maybe you can tell me if the stand-offs and tube socket fasteners were
#4-40 TPI or #6-32 TPI. Mine are drilled & countersunk already but I
have this nagging OCD feeling.
I appreciate the help, each and every time.
NG
All excellent things are as difficult as they are rare__B Spinoza
Roe
Posts: 1918 Joined: Thu May 31, 2007 2:10 pm
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by Roe Sat Oct 11, 2008 2:53 pm
btw, I and a friend are building another comet now
gearhead
Posts: 928 Joined: Sun Mar 19, 2006 2:54 amLocation: Virginia (Fairfax)
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by gearhead Sat Oct 11, 2008 6:52 pm
Anyone have the layout for the Konkord?
telekingdom
Posts: 31 Joined: Mon Sep 18, 2006 12:47 am
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by telekingdom Sun Oct 12, 2008 8:46 pm
I would like to build one of these if someone would be kind enough to send me the information...
Last edited by
telekingdom on Sat Oct 18, 2008 12:24 pm, edited 1 time in total.
Roe
Posts: 1918 Joined: Thu May 31, 2007 2:10 pm
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by Roe Fri Oct 17, 2008 9:03 pm
the second comet started up without problems! no problems with noise or ghosting. had to increase the bias resistor to 10k to get in the right bias range though
Roe
Posts: 1918 Joined: Thu May 31, 2007 2:10 pm
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by Roe Fri Oct 24, 2008 6:33 pm
bnwitt
Posts: 379 Joined: Sat Feb 25, 2006 7:51 pm
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by bnwitt Thu Oct 30, 2008 2:17 pm
Roe wrote: had to increase the bias resistor to 10k to get in the right bias range though
Do you mean the 470 ohm 1 watt resistor was increased to 10K?
Great things happen in a vacuum
Roe
Posts: 1918 Joined: Thu May 31, 2007 2:10 pm
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by Roe Thu Oct 30, 2008 4:21 pm
yes, exactly. this depends on the tubes of course. but 10k gave a much more usable range than 470. the pin 5 voltage was about -78v with the 470 and roughly -50v with the 10k
bnwitt
Posts: 379 Joined: Sat Feb 25, 2006 7:51 pm
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by bnwitt Thu Oct 30, 2008 5:25 pm
Roe wrote: the pin 5 voltage was about -78v
Wow! What PT did you use? What is your B+ voltage at the standby switch? I see in your other post that you are in a 240V part of the country.
Great things happen in a vacuum
tele caster
Posts: 189 Joined: Sat May 24, 2008 5:17 pm
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by tele caster Fri Dec 18, 2009 3:00 pm
Giving this a bump. Anyone have these files so I can have a look? Probably not going to build this, just want to have a look. Thanks.
argonaut
Posts: 72 Joined: Tue Mar 25, 2008 1:47 pmLocation: locked up with Schrödinger's cat
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by argonaut Fri Dec 18, 2009 7:06 pm
Hi, If it's not too much trouble, could someone shoot me the files as well? Have a long winter ahead...
Last edited by
argonaut on Sat Dec 19, 2009 2:46 am, edited 1 time in total.
tictac
Posts: 617 Joined: Fri Mar 31, 2006 4:42 am
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by tictac Fri Dec 18, 2009 10:03 pm
Ditto,
Please....
