June 04, 2023, 01:33:11 AM

Author Topic: Reduction phono amp  (Read 813 times)

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Offline Overthehill

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Reduction phono amp
« on: February 17, 2022, 01:11:09 PM »
Hi, I finished my phono amp and was testing all the resistance and cap readings per manual BUT I had an issue with one reading on one of the lugs on terminal strip. I dug in and checked things out and for some reason I hhad an issue with resistor 47.5K (4752F). I unsoldered it and it broke. To order one takes about 3 to 4 weeks with USPS from Bottlehead. The spec for this resistor per bottlehead is 47.5k 1/8 watt. I found a resistor 47.5k +- 1% 400mw metal film resistor but its one 1/5 the size. Is the original a special resistor? I do not see why the smaller would not work. The original is 1/8 watt or 125mw. If the replament works I would replace both to have matched pair.

Offline Paul Joppa

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Re: Reduction phono amp
« Reply #1 on: February 17, 2022, 01:36:03 PM »
That should work well.
Paul Joppa

Offline Doc B.

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Re: Reduction phono amp
« Reply #2 on: February 17, 2022, 03:54:42 PM »
Just to be clear here, it typically takes 3 to 4 weeks to get a kit, but we usually send out replacement parts within a day or two of the order.
Dan "Doc B." Schmalle
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Bottlehead Corp.