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Offline fynrfin  
#1 Posted : 15 March 2021 22:29:48(UTC)
fynrfin

United States   
Joined: 19/01/2005(UTC)
Posts: 73
Location: United States
I have been reading up on the posts about the old 220V transformers and their too high output.

When last I ran my layout I used an old Marklin trafo for digital, it has two yellow-brown outputs (it is 220 Volts so I use a transformer to change 110V coming out of my mains) - I measured the output as about 18V AC

I checked an old 110 V marklin transformer, the output was also 18V AC.

HOWEVER, the input on my Intellibox says 16V. So is the 18 V AC too much for it?

I think this is the setup I used last time things ran without problems, but I got worried reading about the excess output of 220 V trafos.

Thank you for your help





Steen Jorgensen
Planning a Northern European (DSB and DB) C-track layout with IB control.
Offline DaleSchultz  
#2 Posted : 16 March 2021 02:23:03(UTC)
DaleSchultz

United States   
Joined: 10/02/2006(UTC)
Posts: 3,997
The nominal mains voltage increased from 220 to 240 and 110 to 120 - about 10% that is why what used to produce 16VAC now produces about 18VAC

I know this does not answer the exact question about if the IB can handle the extra 10%. I suspect it would, only because I think we would have heard many sad stories about them frying at 18VAC.
Dale
Intellibox + own software, K-Track
My current layout: https://cabin-layout.mixmox.com
Arrival and Departure signs: https://remotesign.mixmox.com
thanks 1 user liked this useful post by DaleSchultz
Offline H0  
#3 Posted : 16 March 2021 08:08:01(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 15,254
Location: DE-NW
The nominal mains voltage increased from 220 to 230 Volts - about 5% more.
Märklin make a big fuss about this small increase because they went cheap with their 2005 decoder generation. But the real problem about the decoder weakness is the reversing voltage which is extra high on old blue metal transformers.

The IB manual allows up to 18 V input voltage.
Once again this is the nominal voltage. Transformers reach their nominal output voltage with the nominal load, so slightly higher voltages when idle are also OK.
No problem if your transformer gives 18 V without load.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
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thanks 2 users liked this useful post by H0
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