Chip amps used in "push pull"

[kscharf]

Originally posted by bacon665
nooo not what i meant.

p1 and p2 are tied together
G1 is tied to push tube g2 to the pull tube
Cathode and heater both get DC

How is that a mixer?
Need two signals (ie: LO and RF), or if an audio mixer mike 1, mike 2.
But in the case of an audio mixer both signals are in phase.

If you apply pp input to the two grids 180 degrees out of phase and tie the plates together
you will get NO OUTPUT, ZERO as the two out of phase signals cancel each other out.

[bacon665]

so then im taking from this the centertap transformer does a phase shift?

[ssanmor]

Tekko,

We (coldamp) have tried to privately contact you just to know why do you have and express such a negative opinion on our products. As you don't seem to be willing to answer, here come our comments.

In fact you state that your friends had problem with our modules. Strange, because we have had very very few reported problems. Even more, 90% of that problems were due to bad installation and in 100% of cases we provided a quick and satisfactory solution, even repairing/replacing products under warranty that were clearly damaged due to bad use and not due to a defect in manufacturing.

In fact we are very proud of the reliability of our amplifiers and PSUs, that are being used in very demanding applications, even in almost millitary uses with extreme operating conditions, with great success.

We accept criticisms, but we think it is fair that they are, at least, reasoned and if possible, coming from real customers. We also invite our customers to share their experiences with us so everyone can have a clear and real opinion on our company.