Cognomen's latest activity
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.Not glowing, blown heater. If not that, replace some and see if it works again. If neither works, shucks it will cost more: call the...
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.I've sometimes wondered if some tubes were painted colors to make replacement easy for people who did not know what all the numbers and...
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.Months ago I negotiated the purchase of a variety pack of cosmetic pairs of $2-$3 per tube 6J2P, and -ev from Ukraine. Some had painted...
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.For the MKIII, which might be similar, I unplug the tubes, turn it upside down and can see them through holes in the housing with a...
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.It's a US television tube that's inexpensive in the US but perhaps not so abundant in Europe. If one looks around online, one can...
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CCognomen reacted to RaynFox's post in the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide with Like.You really got me wanting to order and try 6EM7 tubes. Are they fine in 6SN7 adapters or is it not good after some time?
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.All of the following tubes are plug and play in 6SN7 adapters. The 6EM7 draws .925Ah. The 6EA7 and 6GL7 seem to have been substitutes...
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CCognomen reacted to barbazz's post in the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide with Like.Keeping up with the testing of some "are you sure it will not burn your house" tubes. This time, some Philips ECH83, made in Heerlen in...
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CCognomen reacted to TrollDragon's post in the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide with Like.My first guess would be the 3 feet of wire connecting the tube that's causing the hum. 😉
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.Works well with the diodes floating/unconnected even though they are heated?
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CCognomen reacted to JazzVinyl's post in the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide with Like.@mordy - I believe the inrush "problem" lies with the B+ (DC voltage/current) being supplied to the anode (plates) prior to the heaters...
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CCognomen reacted to barbazz's post in the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide with Like.Remember my questions about whether we could use dissimilar multisection tubes (triode-pentodes, diode-triodes, etc.) with LD? Well, I'm...
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.Yes was a joke. Interesting that 10 minutes or so in the freezer tended to usually work better than longer time and repeating it...
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.I don't believe in cryo. It was a joke, risky business for postings.
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CCognomen replied to the thread Little Dot Tube Amps: Vacuum Tube Rolling Guide.Yes