OTOMON Laboratory　(音門ラボ) / 50s yearPeerless (Altec) A-428B preamplifier 600:600ohm * 117~230V input

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50s yearPeerless (Altec) A-428B preamplifier 600:600ohm * 117~230V input

We can provide power transformer which use for 117V, 220V, 230V, 240V.
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I will give discount 10% or more for all item in my eBay listing, contact me for more detail

50s yearPeerless (Altec) A-428B preamplifier 600:600ohm * 117~230V input

Manufacturer:: Altec

Audio amplifier > Preamplifiers

Extra rare Peerless A428B preamplifier, Input transformer is 4629, output transformer is 16287. I dont change anything to original schematic, just add power supply for it. Wooden case is red oak wood.

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

Gain is 20db, response frequency is 20~20K Hz. Gain is very very high so you can use this for preamp or LCR amplifier.

Power supply is separated with amplifier part. Power transformer is Sachsenwerk, you can use this amp with 100V input to 230V input . Now it is set at 100v input. 6V6 tube was used for regulating volt supply 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