Ameco PT-2 Preamplifier
The PT-2 is a RF preamp covering 1.8 to 54 MHz. It is designed for a transceiver but works equally well with just a receiver. I purchased this preamp on eBay and it was advertised as working. However, it's getting to be a rare day I ever get anything off eBay that actually works as advertised. I replaced 6 components to get it back in proper working order: three burned resistors (R5, 6, 12), two bad 1N4148 diodes (D3,4) and the power supply electrolytic filter capacitor (C9). I upped the working voltage of the cap; the original was rated at 16 volts but the power supply voltage is +15v. That's too close for comfort so I changed it to a 25-volt cap. Also, half the split shaft of the gain control was broken off, so the knob would not stay put. But otherwise it was in perfect operating condition.