plumsolly
Well-known member
While I was assembling my Mk7 amp today I managed to get some super glue inside two of the glass tubes. I was able to get the tubes clear, but will this compromise the isolation they are supposed to provide? Thanks, Ben
plumsolly said:Does the nature of the passive ps mean that loading will have more of an impact on the voltages? I tried loading it with ~350 ohms and it didn't make much difference.
zebra50 said:Your thinking is right, but your load is wrong (too big). Where did 350 come from?
Check the datasheet for the tube you're using. Most of those little tubes run at something around 300 mA and 6.3 V. EF86 is 200 ma .
R = V/I = 6.3/0.2, so you need about 31.5 ohms (33R) and a couple of watts to be safe. Or just use a tube! If you have 12 V unloaded you should be in the right ball park.
plumsolly said:I calculated that 31.5 ohms, I just didn't have any resistors around that were close to that value with high enough wattage.
we want 7,6V @ 180mA at the output of the psu
Can you explain me how to do this. I don't understand what's the amp you're talking about.You can measure the amp's response using an oscillator
Probably the MK7 mic(amp) you just built
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