Binson Echorec choke and power transformer specs

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Binson Echorec choke and power transformer specs

Postby Rez on Tue Dec 01, 2015 2:55 pm

Hi All,

I cannot find this info anywhere.
I have a Binson Echorec P.E. 603 T tube version.

Could you help me getting the specs for the power supply choke?
I would like to know how to choose a good replacement from Hammond eg.
There they list after the inductance, the ,to me unknown, DC current rating. Or should I take the 0.4 A of the fuse?
My choke has 233 Ohms resistance, although one lead is cut so maybe this affects my measurement.

Could anyone tell me if my power transformer is ok?
I have 24 Ohms on one of the 110V primary taps.
I have 27 Ohms on one of the 110V primary taps.
I have 153 Ohms on the secondary 250V taps.
I have 0 Ohms between the heater windings. Also 0 Ohms between the heater ground lead.

My unit was smoking before I took it all apart to rewire first of all. The transformer has been overly heated judging from the smell back then.
I'm about to put it back together.

Please help me in a direction of an expert otherwise. Pity the people from ESE Music in the UK are not anymore there.
Or could you help me find some the old employees?

Regards,
Rez
Rez
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Re: Binson Echorec choke and power transformer specs

Postby Clanger on Wed Dec 02, 2015 9:29 am

Why do you need to replace the choke? Regardless of that question, it will only be a low current type, 100mA probably, or 200mA for absolute overkill. If you know the inductance the physical size of units will give you a clue.

As regards the PT, those measurements could be ok. High current + low voltage windings like the heater supply will likely show low DC resistance.

In your situation I would remove all valves, bring the unit up on a Variac and monitor whats going on.
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Re: Binson Echorec choke and power transformer specs

Postby Rez on Tue Dec 08, 2015 4:27 pm

The choke has a broken off lead. So I need a new choke.
The inductance is what I would like to find out now.
The choke is about 4 cm wide and high.

The Echorec is totally apart now. Now more slow starting up for now...
All the wiring had to go. It probably shorted somewhere and overheated, only the second time I switched it on.
This happened on the second day, after the seller had showed the unit working to me.
I wish I had looked inside before I took it for another spin...

I hooked up the transformer and got some weird measurements. What would you make of this?:

primary hooked up on 220V AC:

-High voltage1 lead with:
high voltage2: 196 V
ground: 31 V
heater1: 30 V
heater2: 33 V
housing: 29,5 V

-High voltage2 lead with:
high voltage1: 197 V
ground: 129 V
heater1: 125 V
heater2: 129V
housing: 89 V

-Ground lead with:
High voltage1: 30 V
High voltage2: 131V
heater1: 2,3 V
heater2: 2,5 V
housing: 50 V

heater1-heater2: 4,8 V
Rez
Peasant
 
Posts: 2
Joined: Tue Dec 01, 2015 1:48 pm

Re: Binson Echorec choke and power transformer specs

Postby Clanger on Sat Apr 23, 2016 9:37 am

Only just saw this, regarding the transformer voltages, the question would be under what load did you get those voltages.

Hope your project is progressing well.
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