Klemt Echolette S

[Mecaso]

Sorry...sorry...sorry!

Contrary to what I thought , I had too many pre-magnetization on the

three recording heads .

I inserted a 500k potentiometer between 60pf capacitor , 120pF and

220pF and heads, and thus I was able to adjust the pre- magnetizing

voltage applied to each recording heads .

It is true that these heads , instead of presenting a resistance of about

1,000 ohms are only 300 ohms , and I gather that the HF voltage that

was applied to them was too high.

So I consider that my problem is solved.

Sorry to have bothered you with my question ...

[Mecaso]

Hello

My old NG-51S that i used with my orchestra in 60' & 70' is now in working order.

You can see, below, some pictures of it.

[oc disorder]

Hi Mecaso , no need to apologise , this is what this forum is for , if any apology is due it would be from me, for not replying to your question.
I'm glad you got it working , I thought the trim capacitors C14,15, 16 would have the range to adjust the bias.
I have thought about it and was going to suggest a reverse polarity on one or more of the heads as the heads I have seen have 3 wires + , - ,GND/shield.
Only other thing (other fault) I could think of was residual magnetism in the heads metal frame , which would need de-magnetizing like tape recorders do every now and then . Looks like a good bit of history you have there and if Klempt Echolettes could talk what an interesting story we could have !!

[Mecaso]

Hello, oc disorder.

Thanks for answer.

Yes, the trim capacitors C14,15, 16 would have the range to adjust the

bias, but, the resistance of my heads is only 300 ohms under DC, so, this

is perhaps the reason why capacitors are not sufficient.

With my potentiometers, i can adjust bias and my NG51S works

well,.........at my convenience.

Thanks again....

[Mecaso]

Hello

It's again me.

To realize myself my tape-loops for my tape echos, you would have a brand

or a particular type of tape to be recommended to me?

If the rules of the forum does not allow it, you can maybe inform me in

private message.

Thank you....

[Mecaso]

Hello

On one of my NG51S, i suppose the previous owner has done a modification of the oscillator transformer.

Is somebody knowing how many turns of wire are wound on the circuit?



So, L1, how many turns?

So, L2, how many turns? And, too, what is the position of connect to the erase head?

(How many turns between the ground and erase head?)


Many thanks & greetings.....

[Mecaso]

Hello

On one of my NG51S, i suppose the previous owner has done a modification of the oscillator transformer.

Is somebody knowing how many turns of wire are wound on the circuit?

[ATTACH=CONFIG]38249[/ATTACH]

So, L1, how many turns?

So, L2, how many turns? And, too, what is the position of connect to the erase head?

(How many turns between the ground and erase head?)


Many thanks & greetings.....

Hello

It's me!

No body knows the answer at my above question

Thanks & regards....

[oc disorder]

Hello again Mecaso,

I don't know the answer to your question.. but it should be possible to calculate the inductance with the given capacitance to make the 17kHZ (or what ever it is)oscillation.
It also occurs to me that some of the early valve/tube tape recorders may have a near enough bias coil (although possibly a different freq) to replace the original.
That's just an idea ... I guess most of the old mono ones are very hard to find now but I imagine there are a lot more in attics and cellars (basements) in Europe than in Australia.

Maybe a quick trip to Great Britain too before they shut the door ??????

[Mecaso]

Hello again Mecaso,

I don't know the answer to your question.. but it should be possible to calculate the inductance with the given capacitance to make the 17kHZ (or what ever it is)oscillation.
It also occurs to me that some of the early valve/tube tape recorders may have a near enough bias coil (although possibly a different freq) to replace the original.
That's just an idea ... I guess most of the old mono ones are very hard to find now but I imagine there are a lot more in attics and cellars (basements) in Europe than in Australia.

Maybe a quick trip to Great Britain too before they shut the door ??????

Hello

Thanks, oc disorder!

I have a drawing with an ECC82 used in oscillator on a REVOX tape recorder.

But, the ECC82 is used only in triode, not in push-pull.

[epis]

Hi guys, when you're talking about HF bias voltage for recording heads (60 -90 -120volts) do you refer to rms, pk or p-p voltage ?
Thanks in advance

[12xu]

I have 2 of these that need to be restored.

Is there someone that specializes in these that I can send them to.

[Mecaso]

I have 2 of these that need to be restored.

Is there someone that specializes in these that I can send them to.

Hello

I know one man who is able to repair your tape-echo ECHOLETTE.

He is a specialist worlwide known.

His link:

bobbysreparaturen.de

His mail address:

f.staedel @gmx.de

[Mickey]

Klemt Echolette Repairers

Hello

I know one man who is able to repair your tape-echo ECHOLETTE.

He is a specialist worlwide known.

His link:

bobbysreparaturen.de

His mail address:

f.staedel @gmx.de

Hi Mecaso,

Where do you live, posting to Bobby say from AUSTRALIA would be rather expensive.

Cheers and good luck,

Mike

[Mecaso]

Hello

[staxmotownjunkie]

Hi Kazzooman , and Bob Translucid , I have 4 Echolettes the early klemt 51 , on wich I have replaced all heads with Woelke Pro Studiorecorder halftrack heads , the set is working but I have to much noise even without echo or tape running .. so I will have to investigate the rest of the machine to find the noisy parts ... the heads I use work fine , I can adjust for bias to give a maximum on sound and that works satisfactory but next job is finding the noise in the machine , the mechanical parts are replaced , the plastic rollers are replaced by quality steel roller bearings like you find in Revox and Studer recorders , the pinch rollers are replaced by old but very good 8track pinchrollers .. you find them in the good old quality 8track tapes the inside diameter is to big but there is a possibility to pres in a 4 / 8 mm adapter in bronze ( bearings self made) some 8tracks have a plastic pinchwheel , that you can NOT use , but some have a synthetic rubber wheel and that's the one to use ! you can use pinch rollers from normal taperecorders also but still you will have to press out the inside bronze bearingbush and make your own , the old Klemts are running on 4mm axes the later Dynacords run 6mm shafts . so far some experience on these German machines , and yes it's a pain in the ass to get to the electronics . but they WORK HO SO FINE when totally in order .. :-)
keep posted , Ben