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December 18, 2018, 01:26:17 pm

Author Topic: Legacy Repair Gallery/Blog  (Read 310 times)

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Offline Paul Birkeland

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Legacy Repair Gallery/Blog
« on: November 13, 2018, 07:28:51 am »
We still offer repair services on anything we have ever sold! 
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Paul Birkeland

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Re: Legacy Repair Gallery/Blog
« Reply #1 on: November 13, 2018, 07:31:23 am »
This was a pair of Paraglows I received for repair that got the special treatment by the shipping company.  The most sensible course of action turned out to be having new top plates cut out of thicker material in a physically larger size.  These were powder coated in textured black powder and the extra space allowed me to spread out the build components a little bit. 

All capacitors and most of the resistors were replaced during the rebuild.  I will do my best to maintain an inventory of these new chassis plates as undoubtedly there are other Paraglows out there that have suffered a bit while traveling. 
« Last Edit: November 13, 2018, 07:35:22 am by Paul Birkeland »
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Paul Birkeland

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Re: Legacy Repair Gallery/Blog
« Reply #2 on: November 13, 2018, 07:44:05 am »
Since this project is technically built from Paramount parts, I suppose it belongs here. 

I was approached and asked if it would be possible to build a parallel feed 2A3 monoblock where the output transformer could be changed out easily.  This morphed into monoblocks with polypropylene power supply/cathode bypass caps, then naturally shunt regulated 2A3 amps.  Leftover Paramount parts were used, and the TFA-2004JR transformers can be unplugged and unscrewed from the top side of the chassis (with the amp off of course) to facilitate iron rolling. 

The chassis height was increased to accommodate some enormous Clarity Cap  parallel feed capacitors, and they were even given their own wood stretchers to attach to!
« Last Edit: November 13, 2018, 07:45:58 am by Paul Birkeland »
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Paul Birkeland

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Re: Legacy Repair Gallery/Blog
« Reply #3 on: November 13, 2018, 09:16:13 am »
This is one of a pair of Paramour I amplifiers that came to me with blown Hammond power transformers.  Although our replacement PT-2 power transformer is no longer in production, our PT-10 power transformer has the perfect high voltage winding and a low voltage winding that is happy heating a 2A3 provided a DC supply is used.  Along with new power transformers, I replaced all the power supply capacitors. 
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Karl5150

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Re: Legacy Repair Gallery/Blog
« Reply #4 on: November 14, 2018, 03:49:10 am »
Having only been onboard since the introduction of the Reduction, I really like seeing the photos of older BH products.
Karl
Karl
Analog: Planar3>Eros>Stereomour II>Tekton OB4.5 & DIY "S8" subs
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