Photo Gallery

[kmtang]

PIM

As I read from the picture, the OPT is Hammond 1620 which is 6.6K CT. This transformer is designed for use with 6AQ5, 6L6, 6V6 in push-pull mode.


Johnny

 

[pim]

I ran across that one before. An interesting amp.

what changes? How does it sound? OPT primary impedance? Power?

dave

Hi, Dave!
Changes: nothing special, just tuning; power supply is: Hammond 272BX + 5Y3GT + Hammond 193C + 470uF + 3K + 470uF; output transformers are Hammond 1620 (20W, 6.6K, secondary connection for 4Ohm).
Sound is natural, better then I expected. No hum at all (1-2 mV).
Power up to 3.5W; 2W without visible (on OS-5020G) distortions.

 

[yagoolar]

Almost finished: parafeed 6C45PI+300B

Hello,

That is not finished, but that is my first attempt to utilise DHT.
6C45PE as a driver in parafeed and 300B in parafeed too.
Static voltages - OK, weight now 20kg (about 40 lbs)

Tomorrow I am checking dynamic characteristics. See attached pic.

 

[yagoolar]

6PZJ - night

In the night ...

 

[yagoolar]

6pzj - top view

Top view of 6 PZJ amp

 

[kusojiji]

Here's a shot of my stereo 300B. I use a Tung Sol 5U4GB, two Sylvania "Baldwin Organ" 6SN7GTB's, and two TJ Full Music 300B's. Iron is all Hammond, caps are ASC.

 

[karma]

verry nice work

 

[kusojiji]

Thanks! I got a lot of help from some pros. I still need to bring the 6SN7GTB filament voltages down from 6.9VAC. Got some .25 ohm resistors on the way.

 

[kianbach]

Latest re-incarnation

Here's the latest version of my 6SN7 linestage.OD3 regulators for 300v followed by 6SN7 shunt reg and 5k pots to give me 275v of really clean B+.Sound is amazing.Just need a couple of pairs of red based 5692's now

 

[kianbach]

Power Amp.....

And.......here's the SE2A3 power amp I use with it.......

 

[ytlun]

my first works

 

[kusojiji]

Wow, nice chassis. Was it a kit or are you a metal worker?

 

[Alkis]

5687 line pre

 

[morfeas]

KT88 PPUL

KT88 Push Pull UL Monoblocks

Build by my friend Stavros

 

[morfeas]

KT88 PPUL

The guts

 

[Alkis]

..and an other view

 

[karma]

se amp finished

finished just gota add headphone jack and pot

 

[kianbach]

nice work.Schematic?

 

[karma]

this one didnt have a Schematic this one's a rebuild. i just took a pic of the setup just in case i got lost replacing caps and resisters.
and sockets

its the bare minimum in parts

before pic -->

 

[kianbach]

Looks simple enough.I'm looking for a simple SE to build for my eldest son and 2A3's are TOOO expensive for a first amp.Especially to plug his mp3 player into.EL84 or ECL86 I was thinking......