Location: East Riding of Yorkshire these days
Posts: 4,779
I'm Shaun.
Location: London/Durham
Posts: 6,869
I'm Lawrence.
Happened to my with my little dot, turned out one of the pin clamps in the valve socket was loose and not making proper contact. (This also caused a crackling noise when I gently swayed the valve and the pin made contact, which helped me identify which socket.) I solved this by examining the socket and identifying the loose clamp, and forcing the clamps back together by pushing a needle between the clamp and the ceramic.
Sent from my NEM-L51 using Tapatalk
Er... I think I suggested you do that in post #3
Perhaps I was assuming too much prior knowledge, sorry.
Yes, the tests should be done with the valves in. Current flows from the HT through the anode load resistor, through the valve and through the cathode resistor (though the electrons actually flow the opposite way). The current causes voltage drops across the resistors and they're what you measure. However, without the valve in place there can be no current flow and therefore no voltages to measure.
Indeed you did, Andrew. My apologies.
And yes, assuming any prior knowledge is assuming too much. Kits should not be sold to people like me!
(Though, having said that, I got absolutely addicted to the making of it, getting up at stupid hours in the morning to get in my soldering "fix" before going to work.)
IB
Location: Berlin
Posts: 50
I'm George.
Kit seller should provide a good overall instruction how to build up a kit incl. detailed instruction how to test it. If this is not the case -going by your info posted here there was a second test to be done but not clearly specified whether WITH or WITHOUT valves plugged in- then the kit seller is to blame for it. IMO.
"Today scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality"
Nikola Tesla
Its now a conspiracy theory to believe that the Immune system is capable of doing the job it was designed to do.
A fish is only as healthy as the water its swimming in ! [Dr Robert Young]
www.tubedistinctions.co.uk
Matthew 5:10
My kit was bought a very long time ago - 2002, I think - when Audio Note kits came from PQ in Brighton. The whole Audio Note kit operation has been divested since then and is now run under the ANK banner by a very helpful chap in Canada or the US (can't remember which). I think the whole presentation of the kits: the promotional material, the instructions (now including a supporting DVD I think), the support etc. has been massively enhanced and is of a very high standard. Mind you, in fairness to the old Brighton operation, they can't have been doing too much wrong if they can get complete tyros like me through the build process, with a very nice amp at the end that has worked well for years.
Many thanks to all for the help with this.
IB