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We can provide special order made ISO (TANGO) power transformer which use for 117V, 220V, 230V.You dont need to use step down transformer as using my amplifier. Please contact me for more detail. !!!

50s yearPeerless (Altec) A-428B LCR preamplifier for MC/MM cartridge

This product is not for sale, if you want the same item, please contact me for special order making
Manufacturer:
Altec

Audio amplifier » Preamplifiers
Extra rare Peerless A428B preamplifier, Input transformer is 4629, output transformer is 16287. Due to order from customer LCR block was add to use it as phono amplifier.

Prestage tube and secondary tube is 12AY7(12AT7). You can change tube to 12AU7, 12AX7 without any change.

LCR block was added to make it become LCR preamp, using with phono stage.

Input impedance is 30~50ohm, output is 47K ohm,. Volume is DAVEN.

Power supply is separated with amplifier part. Rectifier tube is 5R4GW, 6SN7 and 12AX7 was used for regulating help sound more analog and clearly.

Original schematic is included.
Click to the image to view it in big size and please read our busines term before making your decision

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50s  yearPeerless (Altec) A-428B LCR preamplifier for MC/MM cartridge

50s  yearPeerless (Altec) A-428B LCR preamplifier for MC/MM cartridge

50s  yearPeerless (Altec) A-428B LCR preamplifier for MC/MM cartridge

50s  yearPeerless (Altec) A-428B LCR preamplifier for MC/MM cartridge