[Inductor-Recorded Traction Motor Sound モハラジオ録音] MBTA 1800 Series [GE GTO-VVVF]

[@graythewolf6096]

The PWM pattern for AC variants of GE(now Wabtec) Diesel Electric locomotives is the same as the Breda A650 and DC Metro 1000 Series. Often this is inaudible due to prime mover and cooling system noise. It would be nice to get a recording off of something like an ES44AC but I don't think that is going to happen in the near future.

[@griffinrails]

I've got no idea how you do these, but it's amazing. I'd love to hear one of these for the Sydney Trains Waratah, it has quite a ghostly motor noise.

[@TheSearleFamily123]

Here is the answer to your question: ua-cam.com/video/eBluqH_ySrI/v-deo.html

[@NickDaltonYT]

Holy shit. This is amazing. I am going to dedicate a my own video just to showcase what has been accomplished here.

[@kevinwong6588]

These are in fact based on the R110B.

[@rainbowrailroadcrossing7798]

All time favorite traction motor sound

[@TheSearleFamily123]

Actually the synchronous pattern before and after 15P is 11P (SHE)→11P (CHM)→9P (CHM)→W5P (CHM)→1P (SHE stands for Selective Harmonic Elimination and CHM stands for Current Harmonic Minimum).

[@SigmaRho2922]

The 1800 series are being retired by the T in 2026 because of the Red Line’s planned conversion to CBTC, which uses a different signaling system than the one that is currently present. This eliminates the need for refurbishment of the cars, which are more vulnerable to breakdowns than the 1500/1600/1700 series even though they were built between 1993 and 1994.

[@boiii3productions945]

It is also used in the R110B (definitely not the R110A as that uses the T1 propulsion and the DART light rail)

[@RidgewoodCityDeveloper]

In multi pulse modes, the pulses are: 9, 7, 5, 3, and Wide 3.

[@NickDaltonYT]

I would love to see the same done for the Hawker Siddley 01200s on the orange line

[@TheSearleFamily123]

Those ones don't have AC motors, they have DC motors but without chopper control, therefore the sound of the motor can't be picked up with an inductor.

[@TheSearleFamily123]

I *think* the San Francisco Muni Metro Breda LRV2 also has this. Even the New York City Subway Bombardier R110B has^ it.
^Car numbers 3007, 3002, 3003 and 3009 are still at the 207th Street Yard.

[@turbochargedtransit7241]

IIRC the LRV2s have a slight whooshing sound at low speed, similar to an R179. I’ve been to Boston several times, and the 01800’s have a clear and distinct carrier frequency before going into the synchronous modes.

[@TheSearleFamily123]

@@turbochargedtransit7241 What I meant is that the MUNI LRV2/LRV3 also has GTO-VVVF inverters supplied by General Electric. Not all GE GTO-VVVF inverters have the exact same sounds.

[@benjaminpedi9122]

Keep up the videos

[@trainspotingeurope]

can you do the Stadler Tango NF2 tram? cause it sounds bussin irl ngl.

[@TheSearleFamily123]

I'm afraid he doesn't take requests.

[@thebigtrainguy]

Could you do the class 800 motors?

[@TheSearleFamily123]

I'm afraid he doesn't take requests.

[@justanf40phrailfan21]

We need blue line

[@TheSearleFamily123]

He did record the 0700 series, but please be patient as he is scheduled to upload that in 2023.

[@QuarioQuario54321]

Why don’t you ever do this on trains with DC motors?

[@TheSearleFamily123]

Only works on trains with DC motors and _chopper control._

[@minecraft_javjavatonkoonca8109]

Thistrain inverter

[@icednylonstring]

HOLY SIT YOU FINALLY DID IT