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New Jecklin Float QA !!! - Page 8

post #106 of 663
Quote:
Originally Posted by thinker View Post

From German forum
Wie bereits erwähnt, transformieren die beiden Transformatoren das eingehende Audiosignal auf eine höhere Spannung. Jeder Trafo für einen Stereokanal. Das Übersetzungsverhältnis liegt bei 1:60 und bedeutet beispielsweise: Wenn 1V Audiosignalamplitude ansteht, dann werden daraus hinter dem Trafo 60V. Sind es 3V, werden daraus 180V. Dieses hochtransformierte Audiosignal wird pro Wandlereinheit an die beiden Statorenhälften (-seiten) angelegt.

 

the question is how many watts from amplifier is needed for the transformer/psu to run the phones

 

Okay.

 

I can you not offer a minimum value at the moment. But for this reason I use during my visit (quad-Musikwiedergabe) my CEC HD53N Headphone-Amplifier. I wanted to know how well it works. The performance of the HD53N, depending on the impedance between 10 watts and 18 watts. It worked very well. No audible performance degradation. The volume control range was not at the right stop. I moved on average depending on the CD from 11:00 clock and 14:00 clock potentiometer position. Required classical Tuti inserts came with the necessary speed, power and self-evident. Thus I can say: The power of HD53N revealed no problems. It is of course no harm, to provide them with more power. The Einstein-tube amplifier, which is normally used for quad-Musikwiedergabe for the presentation has much more power. I think about 80 watts into 8 ohms. With this amp all the music is more a matter of course, sovereign, and the pulses have more power. But to me it was to see whether the performance of HD53N enough to work without problems. And this was so.

 

Perhaps one more addition: The old Quad II amplifier (he makes about 15 watts) worked without problems on the previous PSU (transformer transmission ratio 1:30). Theoretically, one could even say that at the current power supply (1:60), even the half-power (7-8 watts) would be sufficient. However, theoretically. The 15 watts of the old Quad II amp is adequate in each case.


Edited by michaelxray - 8/7/12 at 4:08am
post #107 of 663

I am using the speaker post output of my balanced beta 22 to drive the transformer of the TakeT H2+

and have no problem to drive the TakeT H2+.   Can the balanced beta22 drive the Jecklin Float effectively too?  

I also noted that the PSU of the Jecklin float have the amplifier and speaker post options on the back

so it  means that we can use the Jecklin headphone and the speakers and control that by the headphone/

speaker option on the front.   If that's the case it means that I will be able  to drive (by  switching the headphone/speaker

front switch) the Jecklin Float and the TakeT H2+ , with one set of jumper cables to the Jecklin PSU and then

from the Jecklin PSU to the TakeT H2+ transformer.   We can also use the Jecklin Float + AKG K1000 or HE6

using the same idea with appropriate adapter cable from speaker post to balanced XLR of those headphone cables.

post #108 of 663
Quote:
Originally Posted by kiertijai View Post

I am using the speaker post output of my balanced beta 22 to drive the transformer of the TakeT H2+

and have no problem to drive the TakeT H2+.   Can the balanced beta22 drive the Jecklin Float effectively too?  

I also noted that the PSU of the Jecklin float have the amplifier and speaker post options on the back

so it  means that we can use the Jecklin headphone and the speakers and control that by the headphone/

speaker option on the front.   If that's the case it means that I will be able  to drive (by  switching the headphone/speaker

front switch) the Jecklin Float and the TakeT H2+ , with one set of jumper cables to the Jecklin PSU and then

from the Jecklin PSU to the TakeT H2+ transformer.   We can also use the Jecklin Float + AKG K1000 or HE6

using the same idea with appropriate adapter cable from speaker post to balanced XLR of those headphone cables.

 

If my information is correct, that makes the beta22 18 Watt power into 8 ohms, then it can easily operate the current PSU. And yes. At PSU-terminal (speaker) port you can connect another amp. Thus, they can switch on the front, between JJ float operation and other affiliated Amp

post #109 of 663

The T2 will have no problem driving these but you need an external bias supply for them.  A Stax transformer will not work, the ratio on the transformers is far too low. 

 

The PSU box looks nice but EI cores at that price and have they never heard of bridged amps?  Plug anything into that box that doesn't have a grounded - and it will blow up.  Same stupidity as the Woo WEE and all to save a few cents.

post #110 of 663
Quote:
Originally Posted by spritzer View Post

The T2 will have no problem driving these but you need an external bias supply for them.  A Stax transformer will not work, the ratio on the transformers is far too low. 

 

The PSU box looks nice but EI cores at that price and have they never heard of bridged amps?  Plug anything into that box that doesn't have a grounded - and it will blow up.  Same stupidity as the Woo WEE and all to save a few cents.

 

Can you please her words: "plug into that box ..." explain a little more precise.

 

The only thing that is plugged into the PSU front, is a JJ float headphones. Therefore, the PSU is constructed. And nothing explodes.

 

On the back you can loop the signal

 

When switching on the front speakers. And nothing explodes.

 

When switched to Speaker: The amplifier, which delivers the audio signal has no connection with the PSU. It is purely a loop.

post #111 of 663

The - inputs on that box are all connected together and the switch on the front only switches the + signal.  It's only a DPDT switch when a 4P switch is the minimum for this role.  If you have an amp with the - output grounded then this isn't a problem but many modern amps are bridged so the - input must not be grounded or they will turn into ash or constantly trip the protection circuits.  Any Class D/T amp works like this and this is frankly no way to build a transformer box.  Even the dirt cheap units Stax built in the 70's had proper switching. 

 

Of course the audio signal has a connection to the PSU, the CT on the secondaries acts as the ground reference for the bias supply.  Another issue is the utter lack of a transformer for the bias supply.  The mains are connected directly to the bias supply which was ok in the 70's but it's very questionable these days and causes all sorts of safety concerns and performance issues.  I should know as I designed a supply which does the exact same thing but it was meant to be retrofitted inside old Stax boxes and there was no way of fitting a transformer.  That isn't a problem here. 

post #112 of 663

These things are the tasks of the developer (Quad-Musikwiedergabe). I had no opportunity yet to look at me the power supply. I see the same photos at first, like everyone else. Write them an email to quad-music. The developer can certainly relate to position their concerns. I only know that already have plenty of amplifier provides the PSU. Older or Newer. But a problem of security has not been given. Nevertheless, I will speak with quad-music. We will then see the result.

post #113 of 663

Spritzer 's comment is valid and constructive.  I have emaied to Manfred  asking about the  Jecklin Float QA and I

also asked about this concern and his response is positive that there is definite protection for this .  He will provide more information

in the instruction manual.  The price that was mentioned before included German VAT of 19% so the order from outside will be less.   I have

placed the order and am looking forward to the Jecklin Float in 7-8 weeks.  At present I prefer purchasing from Europe than from  US or Japan because

of weak euros, strong US dollars and even stronger Japanese Yen comparing with Thai Baht


Edited by kiertijai - 8/8/12 at 6:25am
post #114 of 663
Quote:
Originally Posted by kiertijai View Post

Spritzer 's comment is valid and constructive.  I have emaied to Manfred  asking about the  Jecklin Float QA and I

also asked about this concern and his response is positive that there is definite protection for this .  He will provide more information

in the instruction manual.  The price that was mentioned before included German VAT of 19% so the order from outside will be less.   I have

placed the order and am looking forward to the Jecklin Float in 7-8 weeks.  At present I prefer purchasing from Europe than from  US or Japan because

of weak euros, strong US dollars and even stronger Japanese Yen comparing with Thai Baht

 

Congrats on placing your order.

 

I'll be placing my order this weekend most likely.

post #115 of 663
Quote:
Originally Posted by MuppetFace View Post

 

Congrats on placing your order.

 

I'll be placing my order this weekend most likely.

I'll have to wait a bit longer before i can buy. So will look forward to your reviews & pictures of your Floats QA. How do these compare to Hifiman and similar phones? As those are the only other phones i'm interested in. Stax have never done it for me

post #116 of 663
Quote:
Originally Posted by tintin40 View Post

I'll have to wait a bit longer before i can buy. So will look forward to your reviews & pictures of your Floats QA. How do these compare to Hifiman and similar phones? As those are the only other phones i'm interested in. Stax have never done it for me

 

        Congratulations - be sure that you have a capable electrostatis amp to drive them.

post #117 of 663

source  http://www.open-end-music.de/vb3/showthread.php?t=4455&page=6


Edited by thinker - 8/14/12 at 2:53am
post #118 of 663

Very nice picture for those who like to build one:-))

 

I'll try to test it in some time. Quad Germany is not that far away from me here in Germany.

 

Regards Georg

post #119 of 663

I sent my down payment to QUAD. Waiting for some kind of confirmation.

post #120 of 663
Quote:
Originally Posted by schorsch View Post

Very nice picture for those who like to build one:-))

 

I'll try to test it in some time. Quad Germany is not that far away from me here in Germany.

 

Regards Georg

 

Georg, the QUAD folks are having a festival on the 8th-9th September - http://www.quad-musik.de/html/quadfest_1.html

 

 

Quote:
Originally Posted by MuppetFace View Post

I sent my down payment to QUAD. Waiting for some kind of confirmation.

 

Call me a sucker for the weird and bizarre headphones out there.  I will most probably never get the chance to try these but I very much enjoyed your writings about the Taket headphones and now it looks like we are in for another treat if you do something similar with the new Jecklins.

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