I like it! That's getting the most out of the MOD-SIX, Mr. Kennedy! On Feb 16, 7:09 pm, Terry Kennedy <[email protected]> wrote: > On Feb 16, 10:08 am, [email protected] wrote: > > > I don't believe there is a direct way to test with simply a volt meter. > > Nope. But the MOD-6 has a nice SEGTST function. > > I use the MOD-6's power supply, a couple of clip leads, and some 22K > resistors. For partially-poisoned segments, I just parallel more 22K's > (decreasing the resistance) until the segment fully lights, then let > it bake for a bit. That's cleared up the tubes I had with partially- > lit underscores. I have a couple weak tubes where parts of some > segments will go dark at the lower brightness settings. > > > Ended up with more bad tubes (b7971's) than I thought I would. ouch. > > But, > > I do have a tube that actually lights 2 segments together (bottom and > > low-right-diagonal). Umm, no font that adds segments. > > I've only ever received 2 duds, both from the same seller. I'll wait > for him to make good before deciding whether or not to name him. One > had the anode wire completely vaporized inside the tube (tested > without current-limiting) and the glass sleeve rattling, while the > other had a bad segment (left-side upper vertical). > > I've received tubes that were partially cathode-poisoned and some with > weak segments. Most were recoverable. > > > The auction for 4 is beyond normal pricing. There are other others as > > well. One issue I believe pricing have gone up is that we are all > > competing > > against each other for them. We should all get together and not bid > > against > > each other. I am SURE it will help. > > There's a US eBay seller who frequently lists pairs at $190, buy-it- > now. The duds weren't from him. The best I've done recently is $75-ish > per tube.
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