Add group to favorites
Back to group list
Send new message to group Search:
From: lisdon@ameritech,net - 26 Jun 2008, 04:24
Hello again. I'm still working on my tube testing project. I have been trying to determine the transconductance of the 6EJ7 tubes I have. Here is my setup: Plate and screen grid at 240 vdc. Heater at 6.3 vdc. Grid 3 tied to cathode. Control grid at -3 vdc tied to cathode through 10 k resistor. Plate current is reading normal and when I vary the grid...
4 Posts. Last post send by: lisdon@ameritech,net - Tuesday 01 Jul
From: flipper - 25 Jun 2008, 05:41
I've posted a preliminary layout checking my top panel drill template in alt.binaries,schematics.electronic. Constructive (pun) comments welcome. Hmm, I suppose I could make the xFD7 heaters switchable between 12.6VAC (13V) and 6.3VAC but since it's going to a non technical person that's probably asking for a 'mistake' to be made.
0 Reply
From: Ted - 24 Jun 2008, 23:52
http :// snipr,com /40000tubes
19 Posts. Last post send by: Jim Menning - Tuesday 01 Jul
From: erigby@batelnet.bs - 24 Jun 2008, 13:50
Hi! For the next few posts a necessary, I will be asking some questions about the innards of the cj pv5 preamp. So I would appreciate help from anyone familiar with the unit. There is a bank of 4 blue 2.2 uf 400v caps in the power supply that supply plate voltage to the tubes. Are these caps polarized? I replaced them with auricaps of the same value...
15 Posts. Last post send by: erigby@batelnet.bs - Tuesday 24 Jun
From: BretLudwig - 23 Jun 2008, 16:22
From an amusingly idiotic ad on Audiogon: >>" Description I am selling my custom made tube amplifier that I bought on ebay. Below is the ad that ran on Ebay at the time when I purchased this amplifier. It is a fantastic amplifier. I have too many amps at home, in fact 6 amplifiers currently and I am downsizing, because I simply have too much. Paypal...
0 Reply
From: John Byrns - 23 Jun 2008, 02:16
Here is an "LF Gain Stepping RC Network Calculator" to go with the "HF Gain Stepping RC Network Calculator" that I posted here about a month ago. This one calculates and plots the response of the type of Low Frequency Gain Stepping RC Network that is used in some amplifier designs to stabilize them at low frequencies when applying NFB. The calculator...
30 Posts. Last post send by: The Phantom - Tuesday 01 Jul
From: Raymond Koonce - 23 Jun 2008, 01:00
Hi RATs, Hope you enjoyed your Sunday afternoon as much as I did, working on a PP amp using 71A triodes for my office environment. I breadboarded one channel and a PS for testing purposes and it sounds pretty good to me. The PS is LCLCRC with 7Hy chokes and motor run caps for filtering. The amp uses transformer input with some Newcomb microphone...
67 Posts. Last post send by: Andy Evans - Tuesday 01 Jul
From: Andre Jute - 20 Jun 2008, 00:58
http :// members.lycos.co.uk/fiultra/BICYCLE%20HUMOUR.html
0 Reply
From: customerservice@thetubecenter,com - 19 Jun 2008, 16:37
I just want to welcome all of you to check out our site at http :// www .thetubecenter,com . We are one of the largest vaccum tube and tube part suppliers in the country with over 3.5 million products stocked under one roof. Can't find that rare tube? Call Us we can probably help. 30+ Years in business in Florida. The Tube Center Webmaster http :// www .the...
1 Posts. Last post send by: customerservice@thetubecenter,com - Thursday 19 Jun
From: RealInfo - 18 Jun 2008, 11:59
Hi all I am working on a fuzz prototype and I need to find a good source for SPDT switches . I am talking about those metal footswitches used in effects boxes like fuzez that switch between channels. Does anyone know a good mannufacturer for those switches ? Thanks in advadnce EC
0 Reply
From: Ian Iveson - 18 Jun 2008, 04:47
Phil Spector played the studio, according to one of his band-leaders. His first disaster was "River Deep Mountain High", IIRC, in part because its complex arrangement and dynamic range were beyond the capabilities of car radios. When I heard these stories they seemed like revelations. Just listening to the Ronettes and it's plain there is a converse...
22 Posts. Last post send by: Ian Iveson - Wednesday 18 Jun
From: Iain Churches - 17 Jun 2008, 12:34
Ian. I tried to send you some data by e.mail with the regard to the Feedback Instruments oscilllator. My e-mail bounced. Please make contact and give a valid e-mail address. To contact me, remove the two-letter abbreviation for NewsGroup. IainNG@kolumbus.fi I start my summer vacation on Thursday Best regards Iain Churches
1 Posts. Last post send by: Iain Churches - Tuesday 17 Jun
From: ZACK. - 17 Jun 2008, 08:21
does anyone have a photo of there first amp. like to see them. ile get a photo of mine soon and post it. thanks zack
11 Posts. Last post send by: Iain Churches - Tuesday 29 Jul
From: Niels H - 17 Jun 2008, 03:53
More info and photos at http :// cgi.ebay,com /ws/eBayISAPI.dll?ViewItem&rd=1&item=230262848284
0 Reply
From: Ted - 16 Jun 2008, 16:29
http :// xrl.us/LeakStereo20
0 Reply
