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PostPosted: Fri Apr 28, 2006 11:04 pm 
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Holy Ghost
Holy Ghost
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Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7432
Location: Brighton, Canada
We are pleased to offer our Custom built 18 Watt Transformer set for $173 USD + shipping.

We worked with Heyboer Transformers to put together an excellent sounding and looking transformer set. Blind sound tests with our sIII amp, have consistently proven that the new Output Transformer, based on the Original Radio Spares Deluxe design, has the Quintessential Marshall sound.

Our custom made Output Transformer set is built by Heyboer to the exact specifications of the original Radio Spares set used in the early Marshall 18 watt amps. This output transformer has convenient flying leads, paper bobbin, vintage grade steel, multiple secondary windings, additional interleaves and splits and the unused ultralinear tap on the primary side has been wound to 5K.

The set is priced at $173 USD plus shipping. This is an excellent price for one of the best sounding 18 watt transformers available. Others may sell this for more than $200.

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Read a Feedback Review - http://trinityamps.com/phpbb/viewtopic.php?f=7&t=4135

The Power transformer sports a black bell and comes with 110/120/220/230/240 V 50/60 hz primaries and a 5V/6.3V transformer tap and 6.3 VAC center tap heater leads.

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This is a premium sounding set, made in the USA that you are guaranteed to be thrilled with.

Compare Pricing:

18 Watt Transformer Set - $173
18 Watt Radio Spares Clone Output Transformer - $95
18 Watt Power Transformer - $115

Shipping within North America when not purchased with a kit is $25.

email: stephen@trinityamps.com

Trinity Amps RS18 Output Transformer Specifications
---------------------------------------------------------------
> Radio Spares Deluxe Design - Quintessential Marshall sound.
> Impedance taps: 8K AND 5K
> Secondaries: 4 ohm, 8 ohm, 16 ohm
> Lamination: M-27 steel
> Bobbin: Paper
> Interleaves: 5
> Primary layers: 18
> Secondary Layers: 5
> Current Capacity: 1.2 Amps maximum.
> Core: 1"x1" EI core
> Mylar between windings or interleaves. Nomax wrap over bobbin; Glassine paper between layers
> Flying leads

Trinity Amps Power Transformer Specifications
-----------------------------------------------------
> Primary: 110/120/220/230/240 V 50/60 hz
> Secondaries:
> > 290-0-290 120 mA
> > 5V 2A Rectifier tap
> > 6.3 V 1A Rectifier tap;
> > 6.3 VCT 3.25A Filament tap;
> Bell Cover Finish: Black
> Flying leads




Trinity Transformer Schematic Hook-Up


Chassis Mounting viewtopic.php?t=1245

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Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps


Last edited by coco on Tue Mar 02, 2010 10:13 pm, edited 5 times in total.

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PostPosted: Thu Aug 21, 2008 7:08 pm 
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Holy Ghost
Holy Ghost
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Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7432
Location: Brighton, Canada
Original Sonic Test Results we performed in 2006.

Test Results

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PostPosted: Thu Jan 06, 2011 10:39 pm 
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Joined: Sun Mar 29, 2009 9:51 am
Posts: 1
Location: Toronto, Canada
Has anyone tried this power transformer with sockets for either a 6ca4 or a 5y3? I thought it should work with a diode in series with the dc output of the 5y3 to keep dc voltage off the heater when a 6ca4 was used. Here's a pic of what I was thinking:

Attachment:
5y3 and 6ca4 together.JPG
5y3 and 6ca4 together.JPG [ 21.58 KiB | Viewed 24913 times ]


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PostPosted: Tue Apr 05, 2011 11:43 am 
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Expert
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Joined: Sun May 20, 2007 1:45 pm
Posts: 1253
Location: YYZ
I don't think that trick would work, but in any case the PT has a separate 5V winding for directly-heated octal rectifiers. So just take the 5V to an octal socket. Be aware that regular 5Y3s drop the voltage by quite a lot more than an EZ81. However Sovtek 5Y3s (which aren't true 5Y3s) don't drop quite so much voltage.

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PostPosted: Sat Jun 01, 2013 8:35 am 
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Holy Ghost
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Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7432
Location: Brighton, Canada
Prices updated to reflect current cost of materials beyond our control.

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PostPosted: Wed Sep 14, 2016 10:50 am 
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Holy Ghost
Holy Ghost
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Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7432
Location: Brighton, Canada
pictures updated

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