oneguy

This item is sold.

I wouldn’t call it wrong, just a simplistic approach. EMI removal is just one of the factors to consider when researching equipment and depending on how far down the rabbit hole you want to go, it may be enough or it may not.

It’s odd that he would make that comment. Differential aka normal mode: Source: http://www.pacificparts.com/vends/mge/images/t1.pdf Source: https://www.alliedelectronics.com/PDF/Power Protection/MGE T100 Ultra Isolator Brochure.pdf Both have 65dB of normal (differential) mode attenuation listed on their specs.

Probably worth bringing up again, the -32 models come with a capacitor installed on the output side from the factory. For the -31 models it has to be user installed if you want to go that route. Source document: https://www.surplussales.com/Transformers/Pdfs/tp-91092-31_N.pdf

Nope. Here’s when I had to do that with one. I put it inside an enclosure and wired a fuse to the primary side. Dusting off the cobwebs to find that photo, lol. I think that was my first build.

Nope. I’ve had over 15 Topaz/MGE/Eaton isolation transformers. -31 models are more DIY. I have used 5x20mm and 6.3x32mm fuse for isolation transformers. The size only matters for fuse housing or holder. I would use slow blow. As for a higher amp rating, I wouldn’t recommend it. Why put your life, house and equipment in peril?

Sorry about that I should have looked at the country flag. I gave you numbers for 120v. For 230v it should be not more than 3.2A (3.15 amp fuse) for conventional and 1.6A (1.6 amp fuse) for balanced power. EDITED FOR AVAILABLE FUSE VALUES. The -31 series do not have a specific place built in to put the fuse. It’s up to you to wire it in to the secondary side.

Are you wiring it for balanced power? If so then 3.1 Amp would max out the transformer. If not, wiring for balanced power then 6.2 amps would max it out.

View Classified Stax SRM-T1 Up for sale is a Stax SRM-T1. The condition is fair and is priced accordingly. The good thing about these older stax amps is the ease at which they can be reconfigured for 100/117/220/240 VAC use. This a great starter amp for cheap entry into the estat world. Asking $350 including PayPal fees and shipping Seller oneguy Date 09/22/23 Price 350.00 USD Category Headphone Amplifiers  

View Classified Stax SR-007 mk1 70xxx Bought recently to compare to my 71xxx. I prefer the lighter signature of my 71xxx and I don’t really have a need to keep a second so I’m putting this up for sale No wire shorts or channel imbalance. Pads are a little worn but still seal properly. Includes case and box. $1550 shipped including PayPal fees. Stand not included. Willing to trade for CRBN or 4070 plus cash. Seller oneguy Date 09/09/23 Price 1,550.00 USD Category Headphones  

View Classified Ferrum Hypsos DC Cable 2m Ferrum Hypsos DC Cable for sale for $121 2.5mm version. Price includes shipping. Seller oneguy Date 09/08/23 Price 121.00 USD Category Accessories  

View Classified Stax HPS-1 Headphone Stand Up for sale is a Stax HPS-1 headphone stand, the perfect pairing for your vintage Stax headphones. Asking $80 shipped. PayPal fees’s ($3) on the buyer. Seller oneguy Date 09/08/23 Price 80.00 USD Category Accessories  

View Classified Stax Sigma Pro Stax Sigma Pro up for sale. Everything is original, no buzz or crackling issue at all. Of the Sigma Pro’s that I have heard, this is the most bass heavy. Looking for $1100 shipped including PayPal fees. I can throw in the pictured headphone stand for $50 if you want to combine the purchases. Willing to trade plus cash for CRBN or 4070. Seller oneguy Date 09/08/23 Price 1,100.00 USD Category Headphones  

View Classified Stax SRM-006tA 120v Up for sale is a Stax SRM-006tA in good condition. No sonic issues at all. This amp has been convertered to run on 120v. Let me know if you have any questions via PM. The asking price is $475 including PayPal fees and shipping fees. Seller oneguy Date 09/08/23 Price 475.00 USD Category Headphone Amplifiers  

@gererickyep, the 91005-31 can’t be tuned. I’m staring at one right now as I swap the electrical sockets near my audio equipment in my new house.