For sale is this nice Heathkit QF-1 Q-Multiplier for your vintage receiver. The 12AX7 vacuum tube tests good. Construction quality is above average as can be seen in the pictures. Currently has octal power plug and miniature phone jack for coaxial output, but you must review the pin-outs for your specific application.

Panel is in excellent condition and the case shows some abrasions, but nothing severe - not worth repainting in my opinion.

Due to the parts-swapping game, no returns unless condition is somehow misrepresented, then at your cost for shipping both ways.

Paypal only Shipping cost is a flat $14.00 using priority flat rate to anywhere in the USA. International shipments are substantially higher and will have a $20.00 handling charge added for the inconvenience.