Jump to content

qwerter

240V to 220V step down transformer

Recommended Posts

Which 240v to 220v step down transformer for a tube amp would you recommend?

Share this post


Link to post
Share on other sites

Can't go wrong with Tortech I've never had an issue with 3 transformers I've owned over the years.

Share this post


Link to post
Share on other sites


9 minutes ago, BATMAQN said:

Can't go wrong with Tortech I've never had an issue with 3 transformers I've owned over the years.

Thank you.

Share this post


Link to post
Share on other sites

+1 for Tortech, very reliable and built like tanks.

Share this post


Link to post
Share on other sites

Both the transformers are autoformers, ie not isolation transformers.  You need to get an isolation transformer.  Tortech make these as well (although they're more expensive) and are highly recommended.

Share this post


Link to post
Share on other sites
Guest jakeyb77
Posted (edited)
20 minutes ago, Bronal said:

Both the transformers are autoformers, ie not isolation transformers.  You need to get an isolation transformer.  Tortech make these as well (although they're more expensive) and are highly recommended.

Yep for the tube amp get the isolation one as stated above.

I have Tortech and Wallcan units and like them both 

Edited by jakeyb77

Share this post


Link to post
Share on other sites


OP wants the European step down, Tortech doesn’t make isolated version for the euro step down.

Probably needs to be a custom built, which can get very pricey.

Share this post


Link to post
Share on other sites

Why do you need one.

what is your mains voltage

does it vary day to night

The percentage difference prob won't have any effect on grid and anode voltages, if it does they will be same for both.

A mains reg would be a better proposition imo 'if ' needed.

Share this post


Link to post
Share on other sites
Posted (edited)
1 hour ago, bazzle said:

Why do you need one.

what is your mains voltage

does it vary day to night

The percentage difference prob won't have any effect on grid and anode voltages, if it does they will be same for both.

A mains reg would be a better proposition imo 'if ' needed.

I beg to differ, 220 to 240v will be a shade off 9.1% increase, on a 6.3v heater that takes it to 6.9v.

Add to that many people in lots of areas get higher than 240 at the wall and this is not great for a tube's longevity, and when looking at other operating points in the circuit also it means the amp is not functioning as intended/designed.

 

Or maybe I'm just picky :|

Edited by muon*

Share this post


Link to post
Share on other sites
Posted (edited)

and unless you have a ground loop issue, I would say not to use isolation transformer on the same unit.

and have it as separates if you needed in future , the cost will be similar to a custom built, and you have two units.

 

with amps , the less things in between outlet to the amp the better, as anything is going to effect dynamics, regardless of price.

unless it's to solve a bigger problem, amps should be plugged directly to wall with simple surge protection.

 

Edited by delphi17

Share this post


Link to post
Share on other sites


12 hours ago, qwerter said:

Which 240v to 220v step down transformer for a tube amp would you recommend?

I have one, very new Tortech. will you be interested?

Share this post


Link to post
Share on other sites
9 minutes ago, TDX said:

I have one, very new Tortech. will you be interested?

If they aren’t I would be :)

Share this post


Link to post
Share on other sites
7 minutes ago, DrMikeOz said:

If they aren’t I would be :)

Thank you. I’ll let you know. 😀

Share this post


Link to post
Share on other sites
Posted (edited)

I pm to OP but thought write here to share my experience. 

 

In my experience, the valve amp may have following issues without a step down transformer:

 

More hum sound;

The amp will run warmer. So as the tubes. Therefore less useful life for tubes. 
 

when running Tortech itself has no hum or any noise, dead quiet.  

Edited by TDX

Share this post


Link to post
Share on other sites


2 hours ago, muon* said:

I beg to differ, 220 to 240v will be a shade off 9.1% increase, on a 6.3v heater that takes it to 6.9v.

Add to that many people in lots of areas get higher than 240 at the wall and this is not great for a tube's longevity, and when looking at other operating points in the circuit also it means the amp is not functioning as intended/designed.

 

Or maybe I'm just picky :|

for tubes, the difference is a lot. I don’t think you are picky. 

Share this post


Link to post
Share on other sites
11 hours ago, Bronal said:

Both the transformers are autoformers, ie not isolation transformers.  You need to get an isolation transformer.  Tortech make these as well (although they're more expensive) and are highly recommended.

Totally agree. Just brought one from Tortech and made a huge improvement on my 300b which was rated 200 to 230v

Share this post


Link to post
Share on other sites
13 minutes ago, stereonut said:

Totally agree. Just brought one from Tortech and made a huge improvement on my 300b which was rated 200 to 230v

Did you get the isolation custom made?

how much was it ? 
thank you 

Share this post


Link to post
Share on other sites
4 minutes ago, delphi17 said:

Did you get the isolation custom made?

how much was it ? 
thank you 

No, I just bought the one listed in OPs thread. About $300 landed to me.  I didn’t find any issue at all.  But I wasn’t experience enough to tell if isolation can be even better.

Share this post


Link to post
Share on other sites
6 hours ago, delphi17 said:

Did you get the isolation custom made?

how much was it ? 
thank you 

Yes - custom made. From memory around $270 inc Express Post to Perth. I discussed my amp with them and they took it from there. 

SN

Share this post


Link to post
Share on other sites
Posted (edited)

I have the Tortech 240v to 220v non-isolated ones and for my many valve power/pre amps that I own I use this Korean beauty that allows me to dial in the voltage that I want. I also check in circuit heater and filament voltages as well at the valve sockets to ensure those toobs are getting the right AC or DC heater voltages.

 

20200620_234031.jpg

Edited by xlr8or

Share this post


Link to post
Share on other sites

I've got one of these on the way from McChanson. Cheaper option than the Tortech. Will hopefully fix some hum issues with my 220V tube amp!

 

https://www.ebay.com.au/itm/1-x-200VA-Step-down-transformer-240V-220V-factor-0-93-fused-for-Valve-amp-1/114245673813?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

Share this post


Link to post
Share on other sites
1 hour ago, Bassline Junkie said:

I've got one of these on the way from McChanson. Cheaper option than the Tortech. Will hopefully fix some hum issues with my 220V tube amp!

 

https://www.ebay.com.au/itm/1-x-200VA-Step-down-transformer-240V-220V-factor-0-93-fused-for-Valve-amp-1/114245673813?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

200va?

 

Hope it's low consumption.

 

What amp?

Share this post


Link to post
Share on other sites
10 hours ago, muon* said:

200va?

 

Hope it's low consumption.

 

What amp?

Geez, good point Muon. It's a Line Magnetic 518ia. Consumption is 320 watts apparently. Maybe I should use this for my LM DAC, and get a Tortech for the amp?

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Classifieds Statistics


    Currently Active Ads

    Total Sales (Since 2018)

    Total Sales Value (Last 14 Days)

    Total Ads Value (Since March 2020)
  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...