New from BC Canada.

The Seven · 31st October 2002, 06:52 AM

Hi,

New from BC Canada.

My hobby is audio electronics. When I was a student, I built a EL84 PP stereo amplifier for myself and helped to build a mono EL34 PP amp for the PA system of my secondary school.

I built most of my own audio electronics:
* Two mono block Mosfet power amplifers, each with six pairs of Hitachi Mosfets.
* A line pre-amp using J-fets.
* A phono amp for MC and MM using J-fets
* An ac power supply for my TD160 turntable.
* DACs using AES 20/21,DF1700P,PCM63P/PCM1702P.

My previous profession was EE and now I have more time to join this forum and learn more from all of you experts.

The Seven

UrSv · 31st October 2002, 07:06 AM

Welcome.

/UrSv

planet10 · 31st October 2002, 07:10 AM

Quote:

Originally posted by The Seven
New from BC Canada.

Welcome Mr Seven.

Can you refine where in BC? BC is big enuff to stuff a number of European countries into

I'd be interested in more detail on that TD160 power supply. I have to resurrect a TD165 and that might be useful.

dave

hifiZen · 31st October 2002, 08:01 AM

Welcome!!!

The more Canadians the better!

Oh, how I miss Vancouver... BC is the best place on earth!

The only place better is a BC full of audio hobbyists!

Maybe I'll have to come back to UBC for some graduate studies...

Anyway, welcome to the forum! Enjoy...

hifiZen · 31st October 2002, 08:08 AM

By the way, is your name in reference to the Group of Seven? Maybe the Magnificent Seven?

Just curious...

Guy Smiley · 31st October 2002, 09:06 AM

There are a lot of us from BC it seems...

fdegrove · 31st October 2002, 09:35 AM

Welcome.

Cheers,

The Seven · 31st October 2002, 02:06 PM

Dave & DIY fanatics,

Residing in Vancouver BC to be more precisely.

My TD160 was migrated from a 50Hz country. So a 50 Hz power supply was designed and built so that it will have the correct rpm in a 60 Hz country as well.

A simple Wien-bridge using opamp (1/2 of 5532) and a pair of low power PNP/NPN transistors driving a step-up ( 10:200) transformer. The dc supply to the opamp and PNP/NPN is +/- 15 volt.

The output frequency is adjusted to 50 Hz by adjusting the R in the RC Wien-bridge. The output voltage is adjusted to 110 volt by adjusting the R in the amplitude-ratio (R-ratio) of the Wien-bridge. The output power is about 1 to 1.5 watt which is enough for the TD160 motor.

The output waveform is as sinusoidal as my signal generator and is very stable. TD160 runs happier with this electronic 50Hz supply than a raw 50 Hz supply. It does give a better sonic effect to my system.

The Seven

The Seven · 31st October 2002, 04:00 PM

Quote:

Originally posted by hifiZen
By the way, is your name in reference to the Group of Seven? Maybe the Magnificent Seven? Just curious...

Neither the Seven Dwarfs in Snow White (because of normal size), nor the Manificent Seven ( no guns except soldering gun), nor the Marantz Seven preamp ( I like to own one). Happened to be the 7th child in the family.

The Seven

Tony D. · 31st October 2002, 04:54 PM

Hi Seven and all,

I am thinking of having a DIY Audio GeekFest at my house in November and just testing the waters to see if anyone is interested.

If we can get a few people together I will put on a Buffet and we can compare soldering iorns etc.

I am in East Vancouver.

Tony D.

31st October 2002, 06:52 AM	#1
The Seven diyAudio Member Join Date: Oct 2002 Location: Canada	New from BC Canada. Hi, New from BC Canada. My hobby is audio electronics. When I was a student, I built a EL84 PP stereo amplifier for myself and helped to build a mono EL34 PP amp for the PA system of my secondary school. I built most of my own audio electronics: * Two mono block Mosfet power amplifers, each with six pairs of Hitachi Mosfets. * A line pre-amp using J-fets. * A phono amp for MC and MM using J-fets * An ac power supply for my TD160 turntable. * DACs using AES 20/21,DF1700P,PCM63P/PCM1702P. My previous profession was EE and now I have more time to join this forum and learn more from all of you experts. The Seven

31st October 2002, 08:01 AM	#4
hifiZen diyAudio Member Join Date: May 2001 Location: Mountain View, CA	Welcome!!! The more Canadians the better! Oh, how I miss Vancouver... BC is the best place on earth! The only place better is a BC full of audio hobbyists! Maybe I'll have to come back to UBC for some graduate studies... Anyway, welcome to the forum! Enjoy... __________________ - Chad.

31st October 2002, 08:08 AM	#5
hifiZen diyAudio Member Join Date: May 2001 Location: Mountain View, CA	By the way, is your name in reference to the Group of Seven? Maybe the Magnificent Seven? Just curious... __________________ - Chad.

31st October 2002, 09:06 AM	#6
Guy Smiley diyAudio Member Join Date: Sep 2002 Location: Vancouver, Canada	There are a lot of us from BC it seems... __________________ It is often better to remain quiet and appear dim witted than it is to open your mouth and remove all doubt

31st October 2002, 09:35 AM	#7
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	Even horses in the sky. Welcome. Cheers, __________________ Frank


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31st October 2002, 07:06 AM	#2
UrSv diyAudio Member Join Date: Jan 2002 Location: Sweden	Welcome. /UrSv

31st October 2002, 02:06 PM	#8
The Seven diyAudio Member Join Date: Oct 2002 Location: Canada	Dave & DIY fanatics, Residing in Vancouver BC to be more precisely. My TD160 was migrated from a 50Hz country. So a 50 Hz power supply was designed and built so that it will have the correct rpm in a 60 Hz country as well. A simple Wien-bridge using opamp (1/2 of 5532) and a pair of low power PNP/NPN transistors driving a step-up ( 10:200) transformer. The dc supply to the opamp and PNP/NPN is +/- 15 volt. The output frequency is adjusted to 50 Hz by adjusting the R in the RC Wien-bridge. The output voltage is adjusted to 110 volt by adjusting the R in the amplitude-ratio (R-ratio) of the Wien-bridge. The output power is about 1 to 1.5 watt which is enough for the TD160 motor. The output waveform is as sinusoidal as my signal generator and is very stable. TD160 runs happier with this electronic 50Hz supply than a raw 50 Hz supply. It does give a better sonic effect to my system. The Seven

31st October 2002, 04:54 PM	#10
Tony D. diyAudio Member Join Date: Feb 2001 Location: Vancouver, B.C., Canada	Hi Seven and all, I am thinking of having a DIY Audio GeekFest at my house in November and just testing the waters to see if anyone is interested. If we can get a few people together I will put on a Buffet and we can compare soldering iorns etc. I am in East Vancouver. Tony D.

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