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Hoffman Amps Forum image Author Topic: Original Ampeg Portaflex B-15N Schematic  (Read 14054 times)

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Offline tubeswell

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Original Ampeg Portaflex B-15N Schematic
« on: April 10, 2020, 08:56:16 pm »
From inside a 1961 Portaflex B-15N


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Offline Jon Snell

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Re: Original Ampeg Portaflex B-15N Schematic
« Reply #1 on: April 24, 2020, 04:20:11 am »
Here is a re drawn schematic
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Offline tubeswell

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Re: Original Ampeg Portaflex B-15N Schematic
« Reply #2 on: April 27, 2020, 08:29:32 pm »
Quote from: Jon Snell on April 24, 2020, 04:20:11 am
Here is a re drawn schematic


You'll note that some of the component values on the 1961 schematic are different.
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Offline kagliostro

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Re: Original Ampeg Portaflex B-15N Schematic
« Reply #3 on: April 28, 2020, 01:55:34 pm »
Just a bit more readable version



Franco

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Offline PboRich

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Re: Original Ampeg Portaflex B-15N Schematic
« Reply #4 on: October 07, 2023, 01:29:32 pm »
I'm going to attempt a B-15 build from scratch.
Does anyone know where I might get detail of the double baffle for a 15" speaker?
Does anyone know if a suitable chassis is being produced?
Thanks for any response.
Rich
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Offline tdvt

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Re: Original Ampeg Portaflex B-15N Schematic
« Reply #5 on: October 10, 2023, 06:56:55 pm »
Maybe start with these pics of a repro & gather hard dimensions...?
Reverse engineer to best guestimate


https://www.fliptops.net/catalog/p-100560/b15n-double-baffle-cabinet
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