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Need a 15v AC power supply recommendation for 89401 signal - Need a 15v AC power supply recommendation for 89401 signal
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Offline Bilge Rat  
#1 Posted : 07 June 2023 19:42:05(UTC)
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Bilge Rat

United States   
Joined: 21/09/2020(UTC)
Posts: 7
Location: Nevada, Las Vegas
I'm looking to add some 89401 signals to my expanded Z scale layout. However, I see from the instructions that they call for a 16v AC power supply and all of mine are DC output. I was wondering what others have used with success since the last thing I want is to fry the signals with a bad decision (electricity and I can sometimes be the worst of enemies - just ask my first computer).

Thanks for any recommendations!

Edited by user 09 June 2023 03:45:39(UTC)  | Reason: Not specified
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Offline H0  
#2 Posted : 07 June 2023 20:30:40(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,267
Location: DE-NW
The manual asks for 16 V AC - and that's the standard voltage of Märklin H0 gauge transformers.
Maybe you can find a 6646 from second hand market.
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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Offline Poor Skeleton  
#3 Posted : 07 June 2023 22:46:53(UTC)
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Poor Skeleton

United Kingdom   
Joined: 09/10/2015(UTC)
Posts: 553
Location: England, Cambridge
Originally Posted by: Bilge Rat Go to Quoted Post
I'm looking to add some 89401 signals to my expanded Z scale layout. However, I see from the instructions that they call for a 15v AC power supply and all of mine are DC output. I was wondering what others have used with success since the last thing I want is to fry the signals with a bad decision (electricity and I can sometimes be the worst of enemies - just ask my first computer).

Thanks for any recommendations!


I checked out the instruction sheet for the signal and it says to use 16V AC or the accessory feed from the switched more power pack, which I happen to know is 12V DC. I'm not sure what to make of this, but I have been using 12V DC to operate turnouts for ages with no problems.

Cheers


Chris
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Offline Bilge Rat  
#4 Posted : 08 June 2023 00:57:06(UTC)
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Bilge Rat

United States   
Joined: 21/09/2020(UTC)
Posts: 7
Location: Nevada, Las Vegas
Originally Posted by: Poor Skeleton Go to Quoted Post
Originally Posted by: Bilge Rat Go to Quoted Post
I'm looking to add some 89401 signals to my expanded Z scale layout. However, I see from the instructions that they call for a 15v AC power supply and all of mine are DC output. I was wondering what others have used with success since the last thing I want is to fry the signals with a bad decision (electricity and I can sometimes be the worst of enemies - just ask my first computer).

Thanks for any recommendations!


I checked out the instruction sheet for the signal and it says to use 16V AC or the accessory feed from the switched more power pack, which I happen to know is 12V DC. I'm not sure what to make of this, but I have been using 12V DC to operate turnouts for ages with no problems.

Cheers


Chris



I tried a test with the semaphore using the standard power supply. I just ran it in an automated loop and after a couple minutes that signal failed to reset (overheating issues?). That's when I dug out the instructions and actually read them (and it's 16V AC, not 15, oops).

I've never had issues using the regular turnouts but those show only a need for using the main (12V) power supply. Silly that a single piece of Z apparatus needs more power than everything else.
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Offline Toosmall  
#5 Posted : 08 June 2023 06:15:31(UTC)
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Toosmall

Australia   
Joined: 26/07/2021(UTC)
Posts: 616
Location: Sydney
I have a 12v DC supply for points.
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Offline BenP  
#6 Posted : 08 June 2023 14:55:10(UTC)
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BenP

United States   
Joined: 04/02/2021(UTC)
Posts: 344
Location: Michigan, Ann Arbor
Surprised that newer semaphore requires 16v ac. The 8940 requires 10v ac, which is accessory power from marklin z transformer. Have you tried 10v ac?
Alternatively, I have been using inexpensive 16v ac transformers from amazon to power boosters and vintage ac lights (for ho layout). They include short and overheat protection like marklin 6646 transformer.
Ben
Digital M (+ some K) track layout with mostly vintage rolling stock and accessories, and small Z scale layout.
https://youtube.com/play...0kgVYbh0CeDTF-bYXoD_2-V9
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Offline Poor Skeleton  
#7 Posted : 08 June 2023 21:30:45(UTC)
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Poor Skeleton

United Kingdom   
Joined: 09/10/2015(UTC)
Posts: 553
Location: England, Cambridge
Originally Posted by: Bilge Rat Go to Quoted Post


I tried a test with the semaphore using the standard power supply. I just ran it in an automated loop and after a couple minutes that signal failed to reset (overheating issues?). That's when I dug out the instructions and actually read them (and it's 16V AC, not 15, oops).

I've never had issues using the regular turnouts but those show only a need for using the main (12V) power supply. Silly that a single piece of Z apparatus needs more power than everything else.



That's interesting - I assumed that the feed to the signals was just momentary, as with the turnouts, and wouldn't have expected them to be energised for long enough to get them hot. Maybe they actually need to be energised continuously whenever they're in one of the positions in which case they may get hotter with DC than with AC.

Hope your signal recovers when it has cooled down.

Cheers


Chris
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Offline veloboldie  
#8 Posted : 16 June 2023 03:38:33(UTC)
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veloboldie

United States   
Joined: 31/05/2018(UTC)
Posts: 61
Location: Arvada
Originally Posted by: Bilge Rat Go to Quoted Post
I'm looking to add some 89401 signals to my expanded Z scale layout. However, I see from the instructions that they call for a 16v AC power supply and all of mine are DC output. I was wondering what others have used with success since the last thing I want is to fry the signals with a bad decision (electricity and I can sometimes be the worst of enemies - just ask my first computer).

Thanks for any recommendations!


You will need to use Universal relay 7244 which has to be powered by Marklin 6646, 120 Volt, 32 VA AC transformer for these series of signals to work. Marklin_Gleisanlagen_Buch_1996_3.pdf (7,908kb) downloaded 19 time(s).
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Offline hxmiesa  
#9 Posted : 16 June 2023 06:47:17(UTC)
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hxmiesa

Spain   
Joined: 15/12/2005(UTC)
Posts: 3,520
Location: Spain
You can also insert a couple of diodes en series with the lamps.
Anti-parallel if it is for AC.
Each diode will drop the voltage about 0,7V.
You dont need them for every lamp, just at the output from your power source.
Best regards
Henrik Hoexbroe ("The Dane In Spain")
http://hoexbroe.tripod.com
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Offline rovertino  
#10 Posted : 23 June 2023 15:53:55(UTC)
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rovertino

Chile   
Joined: 23/06/2023(UTC)
Posts: 3
Location: Valparaiso, Villa Alemana
Originally Posted by: Bilge Rat Go to Quoted Post
I'm looking to add some 89401 signals to my expanded Z scale layout. However, I see from the instructions that they call for a 16v AC power supply and all of mine are DC output. I was wondering what others have used with success since the last thing I want is to fry the signals with a bad decision (electricity and I can sometimes be the worst of enemies - just ask my first computer).

Thanks for any recommendations!


Hi

I've personally tested with 15V AC and it looks like it will brake or jump, it's just too strong and fast! I tried with standard Märklin Z transformer, 10V AC and works perfectly fine. You should give it a try!

Robert.
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