Date   
Re: DCC Meters

Jay
 

A regular VOM will not give an accurate reading.
With a VOM, you have to use the AC setting.
The DCC signal is read as AC by the meter.
It is an approximation that can be as far as 5v off, depending on the quality of the VOM
Another method is needed to get the correct voltage, hence this thread.

Jay

Re: Buss wire

PennsyNut
 

I have solved my problem in another way. Since I had tons of AWG 20. I simply ran a separate wire from the rail to the command station. At the C.S. end, used terminal blocks. Connected two wires to each screw and all screws wired to the C.S. with AWG 18. That's only about a foot. The longest wire from a rail to the C.S. is just shy of 12 feet. All others are shorter. There are now a total of 19 wires at the C.S. 10 blue and 9 red. All easy to wire, all connected to the C.S. with screws. And all have feeders of less than 12" connected to the same AWG wires as a buss. I hope this is clear. I tested with 3 different H.F. meters. Measured AC volts, DC volts, resistance and continuity of all tracks at various places/each end and in between the ends and the C.S. and all readings are consistent. Loco runs fine with no slowdown or change in speed. Not sure how to measure amps. (Am not about to spend money on a RRamp).But what works, works. Thanks to all for your suggestions. And since I'm such a contrarian. All wires are on top of the foam and all run from the rails to the front edge of the layout and run along that front to the place where the terminal blocks are and the C.S./a Zephyr also on top. Everything easy to reach, easy to work with, easy to check for shorts, etc. All wires soldered or with screw connectors. No sloppy. All color coded. All just the way I wanted. But because of all your suggestions and advice, I am now a happily wired up. LOL
Morgan Bilbo, new to DCC

Re: going from bachmann to peco

staceyatvt@...
 

yes thats 2 answers pennsynut answered 
i will go with all peco code #83 no mixing 
yes that is what i try explain but yes  i want to do is keep turnouts separtly from layouts 
pennsynut is that a controll or direction box to use for the turnouts  like peco has switch machines 
like bachmann has direction switch boxs  type a and type b  

Re: going from bachmann to peco

staceyatvt@...
 

oh i forgot  to ask dose peco or site that list all there pruducts for usa 
i hate to buy something i cant use because its not usa lol

Re: DCC Meters

Charles Brumbelow
 

This article may be relevant...


Charles





On Saturday, April 27, 2019, 11:52 AM, Jay <jayfmn@q.com> wrote:

A regular VOM will not give an accurate reading.
With a VOM, you have to use the AC setting.
The DCC signal is read as AC by the meter.
It is an approximation that can be as far as 5v off, depending on the quality of the VOM
Another method is needed to get the correct voltage, hence this thread.

Jay

Re: DCC Meters

Richard Gagnon
 

It has never been five volts off with my four meters.

Rich




On Saturday, April 27, 2019, 12:52 PM, Jay <jayfmn@q.com> wrote:

A regular VOM will not give an accurate reading.
With a VOM, you have to use the AC setting.
The DCC signal is read as AC by the meter.
It is an approximation that can be as far as 5v off, depending on the quality of the VOM
Another method is needed to get the correct voltage, hence this thread.

Jay

Re: DCC Meters

Jay
 

Rich, I had a cheapie from one of "those stores".
Compared to my DCC RRamMeter it was a full 7v off.
This was a needle type meter also.
It was close in regular voltage testing.

Jay

Re: DCC Meters

Jay
 

Hi!
In this article, he is just reading straight DC.
There is no DCC signal involved at that point.

Jay

Re: DCC Meters

Richard Gagnon
 

I compared with two Scopes. Did the math to convert P to P to RMS. This is model rail roading not rocket science.
I also have a digital scope that shows RMS also. I rarely mention it because of the naysayers.
Another forum some have simuilar results with the HF meter.
I have worked with different meters for forty years.

Rich




On Saturday, April 27, 2019, 12:52 PM, Jay <jayfmn@q.com> wrote:

A regular VOM will not give an accurate reading.
With a VOM, you have to use the AC setting.
The DCC signal is read as AC by the meter.
It is an approximation that can be as far as 5v off, depending on the quality of the VOM
Another method is needed to get the correct voltage, hence this thread.

Jay

Re: DCC Meters

Richard Gagnon
 

I know many say I believe but I have measured.

Rich




On Saturday, April 27, 2019, 1:29 PM, Charles Brumbelow via Groups.Io <mrb37211@...> wrote:

This article may be relevant...


Charles





On Saturday, April 27, 2019, 11:52 AM, Jay <jayfmn@q.com> wrote:

A regular VOM will not give an accurate reading.
With a VOM, you have to use the AC setting.
The DCC signal is read as AC by the meter.
It is an approximation that can be as far as 5v off, depending on the quality of the VOM
Another method is needed to get the correct voltage, hence this thread.

Jay

Re: going from bachmann to Hell and Back.

Richard Gagnon
 

I have Bachmann with on board sound and DCC ready that I have added sound to. There will always be naysayers.

Rich




On Saturday, April 27, 2019, 12:37 PM, PennsyNut <pennsynut@...> wrote:

Oh my gosh! I've heard of this all my life, and yet - Botchman still is in business. Someone tell me how they do that? But if you want a specific prototype, you must spend more money. At least we don't have to buy brass. There's some good locos for sale.
Morgan Bilbo, new to DCC

Re: DCC Meters

Jay
 

Hi Rich,
I just tried my 2 digital VOM's.
My Fluke 75 gave me a very close reading of 11.06v on my Z Layout.
The command station is going through a UP6Z.
My Micronta meter gave me 15.7v at the same point.

Jay

Re: DCC Meters

Brad Bunnin
 

Fluke meters are reliable, in the statistical sense. They’re also easy to use, versatile, and durable. But they’re not cheap. I was lucky enough to buy a used one from an electronics guy who was retiring. It’s worth keeping a lookout for a used instrument.

Brad 

On Apr 27, 2019, at 4:33 PM, Jay <jayfmn@q.com> wrote:

Hi Rich,
I just tried my 2 digital VOM's.
My Fluke 75 gave me a very close reading of 11.06v on my Z Layout.
The command station is going through a UP6Z.
My Micronta meter gave me 15.7v at the same point.

Jay

Re: DCC Meters

Jay
 

Hi Brad, I picked this up at a house sale.
It was $45.
I could not pass that up

Railroad Drop Bridges

Carl
 

Hi Gang:

Model Railroad Hobbyist Magazine just published my article about Jim Behling's Drop Bridges. You can view the video here:

https://www.youtube.com/watch?v=UeSBft9nRDo&feature=youtu.be

Hope you all enjoy it.

Carl.

Running Extra May 2019.

https://mrhmag.com


Virus-free. www.avast.com

Re: going from bachmann to Hell and Back.

Puckdropper
 

How does Bachmann keep going? From the standpoint of a guy who fixes trains:
* Parts are often available and available through their website.
* Absolutely fantastic support. Laura Harris understands your questions, reads your whole email, and replies within a few days.
* Fantastic parts department. I had a question that fit in both the parts and customer service domains, emailed parts first and they answered their part and forwarded the email to customer service so they could address it.
* Their locomotives usually run decent. You're not going to get Kato performance in every box, but you'll get something that runs every time.
* Best warranty / Service plan in the business, short of "We'll just fix it.". $25 will get even an old locomotove repaired or replaced. (See website for details.)

I'm not affiliated with Bachmann, just an extremely satisfied customer.

Puckdropper

Re: DCC Meters

Michael Rozeboom
 

On 2019-04-27 7:54 p.m., Brad Bunnin wrote:
Fluke meters are reliable, in the statistical sense. They’re also easy to use, versatile, and durable. But they’re not cheap. I was lucky enough to buy a used one from an electronics guy who was retiring. It’s worth keeping a lookout for a used instrument.



Fluke meters are good, but their accuracy is a function of price.  Towards the low end, they work well, but only guarantee their AC accuracy to about 2kHz.  Their desktop DMMs are accurate into the 100s of kHz on AC.  I also have a Fluke 1000:1 probe at at work, you don't use that with a low end handheld. For real accuracy and less mental math you have to use that with one of their high end handhelds.


Some of the TEK desktop DMMs out there are in fact a rebadged Fluke.


For the truly cool factor (and accuracy to go with it), you want the old HP3458A. 











Michael Rozeboom



Re: DCC Meters

Brad Bunnin
 

A great buy! It’ll prove extremely useful. 

I think I paid about the same for mine. My wife’s reaction: “What do you need that for?”

What’s your layout like, Jay?

Brad

On Apr 27, 2019, at 7:07 PM, Jay <jayfmn@q.com> wrote:

Hi Brad, I picked this up at a house sale.
It was $45.
I could not pass that up

Re: DCC Meters

Carl
 

Hi Gang:

When I worked, I was a tool maker and a gage designer. When I designed a gage, getting the measurement right was important, similar to knowing your true DCC voltage. As a tool maker doing setups knowing my vise was straight was important to a certain tolerance, but this was a comparative measurement. So on a train layout knowing if the DCC voltage drops is what you are looking for, not the exact value. If it drops you can search for the problem. Similar to the engine temperature gage in your car, seldom are values shown, just too hot and too cold.

Carl.



Virus-free. www.avast.com

Re: Railroad Drop Bridges

Mark Cartwright
 

Carl 
Thank you for this....I am once again gathering notes for a bridge from my Cabinets over to my Main 30" High Layout.
For now...
I plan on swinging out Two Operational Matched/Twin Bascule Bridges which together sit on one section of lumber/aluminum then (river below); then are locked into place.
Just getting the two Bascule bridges to align has been an issue..
I added a second motor and gear assembly which seems to tighten up the bridge considerably as it lowers into place. Now for the other one.
Mark