OTOMON Laboratory　(音門ラボ) / 50s yearPeerless (Altec) A-428B preamplifier 600:600ohm * VG+++

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50s yearPeerless (Altec) A-428B preamplifier 600:600ohm * VG+++

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 * VG+++

THIS ITEM WAS SOLD OUT

Manufacturer:: Altec

Audio amplifier > Preamplifiers

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

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.

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.

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