Musical Fidelity X10-D transformer question

[bassey321]

Can anyone please advise. I have been given a Toroidal Transformer rated at 0-115, 0-115 to 0-19v and 25-30va, will this be ok to use to power both the buffer and a x-can v2 will i cook them??? any help will be appreciated

[Deleted]

NO !!!

12V AC is required. 19V AC is far too high.

[mrarroyo]

basey321, you can save some money and go to www.jameco.com and look for Jameco P/N 167151. It is an AC to AC Wall Transformer with the following specs:

Input: 120VAC@60Hz
Output voltage: 12VAC
Output current: 1500mA
Output Plug: 2.1mmID x 5.5mmOD female
Cord length: 6'
Color: black
Dimensions: 3.36"H x 2.68"W x 2.15"D
Weight: 1.5 lbs.

You can buy it for $7.59 plus S&H. Good luck.

[XTRProf]

Hi there,

Use a "real" trranformer and not wallwart for best sound. See my thread on how I'm going to revive my kaput X-PSU V3. You can pick up some tips there. I'll post some pictures once taken as now I'm wiring my transformer up into the X-PSU casing. Please be warned there are HIGH FATAL VOLTAGE in what you going to see in my thread. So if you are not well versed in high voltage AC connection, please don't do it.

Our helpfull and friendly Chris (simba00000) is also doing one up. Please see his thread on modes beyond rockgrotto stuffs here. I think I better stop here. ;D

[Deleted]

" I think I better stop here."

XTRProf
A good idea ! ;D

Not everyone wants, or needs, a transformer of the type that you have described. In the majority of cases, a wallwart such as Miguel suggested, with 3 x the normal current capacity , will give excellent results with anything but the most highly tuned equipment. Foir higher performance they could purchase one of Mike's Little Pinkies. The more technically advanced members however may appreciate a toroidal transformer as described, but with an on/off switch, indicator LED, and less ambitious socketry etc. Perhaps you should also describe a less sophisticated version for general consumption ? Alternatively, you could suggest more mainstream substitutes, perhaps including a supplier and part no. of suitable alternatives.
Regards
Alex.

[XTRProf]

sandyk said:

" I think I better stop here."

Perhaps you should also describe a less sophisticated version for general consumption ?

Let's see what I can rig up here. I hope that wouldn't dampen Mike's Pinkie sales. Not my intention here. I'm here to share our passion on Hifi stuffs, just like Chris.

[Deleted]

XTRProf
I doubt that an alternative like that would dampen Mike's sales. In fact, the more information that is given , the more interest is likely to be stimulated in this worthwhile area.
Alex

[coolmaster]

I've been using a 80VA toroidal tranny to power both XLP and X-10Dv1. There's two 12VAC windings and I've connected the MF components seperately. I can't figure out why I hear an irritating buzz from the tranny when the X-10D is functioning. I'm guessing its something to do with the tube heater supply and I can't figure out whats wrong. Remove the tubes and the buzz is gone. Other than that, both perform ok. Any answers?.

[Deleted]

coolmaster
Almost certainly due to the heavy load on one half cycle due mainly to the half wave rectification used for the filaments, and the electrolytic capacitor across the filaments for smoothing. Not an ideal way to do things. It will also invariably affect the supply to the other component to some degree. 2 x 50VA transformers would have been better.

SandyK

[coolmaster]

SandyK
It buzzes even if X-10D is connected alone. I'm thinking of removing that rectifier and smoothing caps, let the heaters on 12VAC. I'm hoping that works with no funny effects.
Will try it now and report back later.

[Deleted]

Coolmaster
You are likely to end up with a low level hum .
SandyK


Do you have a copy of the schematic ?

[coolmaster]

Hey..it works!..no more buzz from the tranny and no audible or irritating hum, volume knob cranked up 12 o'clock without input signal. But there's a twist to it. My system is hooked to a huge 5KVA motorized AVR preset at 230VAC. This ensured the tube heater is below at somewhere 6.5V each..otherwise it reads at 7+VAC when to the unregulated power supply.

I've got the schematic somewhere in my HDD. Back to listening to the rig..vinyl records.

[Deleted]

coolmaster
Seeing there is now no buzz, and it's quiet, well done !
BTW, I have a schematic, I was only wondering if you needed a copy.
SandyK

[coolmaster]

SandyK
Thank you very much for the offer.
I've now plonked in a new pair of Russian 6N1P which I'm trying to gauge the sonic quality whether I'm liking it or not. Initial findings were it sounded somewhat lighter and drier bass.

[Deleted]

Coolmaster
If you have room inside your PSU, and desire to return to a DC supply for the tubes, you may be able to overcome the buzzing problem, and the consequent distortion of the AC waveform
to the other more sensitive component as well, by connecting a diode feeding -VE output into a parallel 39ohm 5W resistor and 1,000uF 25V electrolytic capacitor combination. The components could be mounted on a tagstrip adjacent to the buffer's supply socket. Could be worth trying, as the cost would be very little.

SandyK

[coolmaster]

SandyK:
Thanks for your great tip. Most certainly I've intended to return to DC heater in future but considering I have those 6N1P tubes inside, with an obvious problem of drawing more heater current than others, I'd leave it to AC supply meantime. I'm patiently waiting for an affordable deal of 6H23 tubes (bulk of 2 pairs or more) to see if its equal or better than the 6N1P. Should 6H23 work out..I'm for certain modding it permanently to DC supply. I'm glad I've easy access to obtaining most common solid state parts to tackle DIY mods. Tubes and related parts IS a problem.

P.S. Too early to tell but I initially find the 6N1P tubes to sound excellent after at least 45minutes in operation. I'll have to listen to them over a week to establish how it'll suit me. The X-LP sounds best mated to the X-10D and I can't do without it.

[PinkFloyd]

I hope that wouldn't dampen Mike's Pinkie sales

What sales? ;D