Matched Pills?

[High Voltage Mobile NJ]

High Voltage, I will come say hello to you this weekend. Only if you promise NOT to do any cartwheels. LOL!

My little 5 pill does not have matched pills and it does just what it's supposed to do according to the Bird.

I would agree that having all matched pills looks nicer and probably serves a purpose for stability but for example if you bought 4 brand new pills from different vendors (different lot numbers) I don't see how that would negatively affect performance.

why . i can do perfect cartwheels !!!! lol lol lol but not that good in the sand , i almost sprained my wrist , lol lol lol
i

[Gordon Gekko]

LoL. Ill say hi on Saturday.

[coolbreeze]

Bottom line. matched transistors, or matched tubes are a JOKE!!!! that some moron made up to make himself sound smart

[doughboy]

Matched tubes make a large difference especially in sets of 2 in a circuit that requires netreulazation suchs as a yaesu ft 101 or the like

[coolbreeze]

do you really believe that?
there is no way to match pills or tubes. same manufacturing batch is the closest thing.

now if one tube is 80% and the other is new or like new, that would be a problem, but its from dead equipment, not unmatched tubes.

[doughboy]

Are you familiar with the neutralaztion process in an ft-101 have you ever done it?

[doughboy]

When tubes are built, there is some value of capacitance between the elements.
When the tube is energized, this capacitance can cause feedback by inducing
Voltage onto the grid. This will cause the tube to oscillate in it's steady
state. This effect is identical with single tube circuits and multiple tube
circuits.

What the neutralization circuit does is to tap off of the oscillating output
signal, invert it and feed a variable amount of it back to the grid or input
circuit, which can neutralizes the oscillation by the two opposing (and if
you adjusted it right, identical) sine waves canceling each other on the
grid, thus negating the capacitive feedback signal. In this state, the steady
state oscillation tendency by interelectrode capacitance is neutral and the
circuit is know to be neutralized.

The tubes do not need to be matched but the closer the internal capacitance is to each other the easier they become to neutralize sometimes if they are 2 different brands it is impossible to neutralize them with out adding caps and other horseshit do they perform better matched well that is usually such a small difference it doesn't even matter

[High Voltage Mobile NJ]

your right doughboy . as a technician i stand for that all the way. you can even solve that as a math equation to . it makes a world of difference. it also has to deal with impedance and internal resistance of the tube or transistor the way it is manufactured . some transistors like motorola use a beta gain factor , and special care has to be made when designing a multiple circuit . balance 100 ohm resistors can only help the transistor so much , but if they are not matched correctly , in time they will not last .

[coolbreeze]

doughboy your last paragraph is good. and much closer to whats needed then a matched set.

now hv you do realise that you do not need any 100 ohm resistors in a pill box. they are tattle tails for diagnostic, they balance nothing. if they attempt to balance they burn to a crisp.
only the 10 ohm resistors are needed.

[High Voltage Mobile NJ]

lol you crazy breeze . the only thing the 10 ohm resister is used for is to let you no when a pill is toastedddddddddd . i thought you new that broooooo