How much do they go for these days?If you can find a pair of the EML 45 Mesh Anniversary tubes that were sold by Lampi, you’d probably be very happy. They don’t come up often.
How much do they go for these days?If you can find a pair of the EML 45 Mesh Anniversary tubes that were sold by Lampi, you’d probably be very happy. They don’t come up often.
Best is still the sylvamia 6550 for this class. Dt459 might be good too but very hard to track downHello All!
Outside of the TRP thread I’m seeking more current owner inputs on the use of KT88’s and if you’re happy with their performanc- which brand/flavor (as some make more than one model) are you currently using? I was recently pitched PSVane KT88’s (computer matched) but not sure of which version. I’m more than hesitant on this as my TRP was shipped with a quad of LinLai KT88’s and their just not my cup of tea (used with Sophia Aqua 274B). Any input would be appreciated!
@highstream
Do you have a multimeter? Without knowing the properties of the circuit and the tube it hard to tell exactly (in number values). I would tend to believe that you could measure the output from the tube sockets both prior to and after placing the adapter. A little math would provide the drop in current/resistance.
Have you tried inserting the probes into the top of the socket directly? I have a TRP3- not a GG but my documentation states that on the rectifier input measurements should be able to be taken across pins 2 and 8. If you power up and pull the tube measure the ohms across those pins. Afterwards plug your adapter into the socket and measure again across those pins to determine the delta in Ohms.
I’ve looked for a data sheet on the tube as you’ve described it and come up with nothing. Do you have a data sheet for it? The design specs may shed some light on the operational range of the tube.Whilst were on the subject, I have a pv200/600 rectifier which is a 4V tube. Its pin configuration means it plugs straight in. Any issue with running a 4V tube with no adapter/resistor? I think the socket is 5V?
OK thanks for the info. The diagrams dont mean much to me, as I dont know how to read them, but the message is clear!This is the PV200/600 pinout:
View attachment 119092
and here is the 5U4G pinout:
View attachment 119093
(sorry about the size difference). In the first case, the filaments are separated by an anode, in the second case, not; so there's no way to plug the PV200/600 correctly into the dac's socket without an adapter.
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