Please help i have a Palomar 300A 2 pill mobile amp and i cant find a schematic on it anywhere i can only find tube style now the reason why i need the schematic is i got 2 new 2sc2879 for it but someone removed the rf chokes and i have new ones but not sure where to soldier the wires these were the only things missing thanks
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Palomar 300A 2 pill
- Thread starter pimphand442
- Start date
chokes?
Or ten ohm resistor`s?
if it is the two ten ohm resistors they go from the base of each transistor to ground.
73
Jeff
Or ten ohm resistor`s?
if it is the two ten ohm resistors they go from the base of each transistor to ground.
73
Jeff
I have dug around every where I can think of and can not find a Schematic for that amp.
There where a lot of small amps made with the Palomar name.
The closes thing I could find that fit`s the amp you describe is this one:
Palomar 400 Service Manual
But that amp uses 4 output transistors.
73
Jeff
There where a lot of small amps made with the Palomar name.
The closes thing I could find that fit`s the amp you describe is this one:
Palomar 400 Service Manual
But that amp uses 4 output transistors.
73
Jeff
There would be only need for one choke from the input transformers to ground but need for two 10 ohm resistors from the base of the transistors to ground.
If it's the choke missing it would go from front side of the transformer(side opposite the transistors) to ground.
If it's the resistors they go from the base of the transistors just behind the input transformers.
You can look at most palomars for directions as there is no difference in construction between it and any other unless the amp has biasing or switchable biasing which would require a circuit to switch out the dc grounding of the rf choke to the input transformer and switch in the bias circuit but I don't believe you'res has that.
the layour of a palomar 350hd is same layout but mine has 3 relays when i key up is when it sends 13.5v through the pills
Must have one helluva relay to power those transformers.
Usually the voltage to the tranformer is constant and one of the relays controls the RF input to the transistors, one of the other relays is most likely a preamp and the other for activating a bias circuit.