Monday Modify : Continue With NEC Mono-Block Part 3

Just hear the sound from these Siemens F2a mono-block amplifiers.

After finish assembly these amplifiers. I've found the problem with "Hiss" sound 

and try to discover the main cause.

Not from ground-loop or components but I missing "Grid Stopper" 

on WE409A/6AS6 the driver tubes.

Problem's gone when install carbon composition resistors on their grids.

Waiting for spray their cover part to complete the look.

So my cat fell asleep with the sound from this amplifiers. ZZZzzz

Monday Modify : Continue With NEC Mono-Block Part 2

Already install all components into both chassis.

Waiting for some parts on the panels.

Hope to finish and hear the sound soon :)

Style Style & Style : Cool Idea from IKEA products

After finding out furnitures for my house, I just found this cool website.

http://www.ikeahackers.net/

Many smart ideas for mix and match IKEA products together.
Also adapt products to use in different applications.
And I found this exciting style too ...

http://www.ikeahackers.net/2014/05/high-end-audio-with-furutorp.html

More pictures here

http://www.holgerbarske.com/fflight2014/index.html

But I cannot found this product on my local IKEA store :(

Old School Tangential Tonearm : Rabco ST-4

After using in  fair condition for a long time. 

My Rabco ST-4 " Straight Line Tracking" turntable should be need a new plinth.

Highly recommend to use with  thick cantilever cartridge like Shure M3D/M7D 

and others in same era.

Also match with legendary Jazz & Blues.

Thanks http://wegavision.pytalhost.com/ for this rare catalog.

 

Monday Modify : Continue With NEC Mono-Block

From my previous post

http://mellowgroovy.blogspot.com/2014/03/the-lost-world-nippon-electric-company.html

It's time to start up new design amplifier project 

with original main parts of NEC Mono-Block. 

Winding Resistance Step Attenuator

After searching many information of vintage step attenuator 

for use in my tube preamplifier.

I've found attenuator in the box that use Tech Lab 600 Ohm attenuators.

Tech Lab Inc. was made high quality attenuator like Daven did,

that use in audio and measurement products like Western Electric, Tektronix, etc.

Stereo Sound Japan was provide information of 

Tech Lab PK-322 that has 2 types of resistor inside.

Type I : Mold Resistor & Winding Resistance Type

Type II : All Winding Resistance Type

Attenuator in the box from Stereo Sound Japan 

was use in many test system of Tube Kingdom magazine.

Like Stereo Sound Japan Website recommended.

Type I attenuator matched with all popular and modern music and 

Type II attenuator matched with old school music like Blues, Jazz and Classical. 

Both types improve dynamic and detail of sound system a lot. 

Let's try !!!

Tuesday Tube : P.A.-210A Perryman with Mesh Plate

210 tube series still one of the best DHT tube for Brass, Woodwind and String.
Especially Thoriated-Tungsten match with those instruments than Oxide-Coated.

But 210 tube with mesh plate can sing both vocal & instruments best together.
Deep, Airy and Detail are words that I can describe
after compare with other 210 tube series in my preamplifier.

210 mesh plate still hard to find
but worth to get for listen hidden sound from your system.

First picture is a pair of 210 Marathon with old style filament suspension.

The rest are pictures of 210A Perryman with ST-era style filament suspension.