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SuperRetroville
เข้าร่วมเมื่อ 21 ก.ย. 2011
Lucas 3rd brush dynamo overhaul part 3 : commutator and field resistance
Continuing the renovation of a Lucas C45 dynamo from a Standard Big 9, I clean up the commutator in the lathe and make a replacement field resistor from 0.5mm Nichrome wire
มุมมอง: 80
วีดีโอ
1930s Lucas 3rd brush dynamo overhaul Part2 : Dismantling
มุมมอง 137วันที่ผ่านมา
In this video I dismantle a Lucas C45 3rd brush dynamo from a Standard Big 9.
1930s Lucas 3rd brush dynamo. How it works and overhaul, part 1.
มุมมอง 10414 วันที่ผ่านมา
In this video I explain the operating principles of a typical "3rd brush" dynamo, common on many pre-war cars, with reference to the Lucas C45 dynamo from a Standard Big 9. We do an evaluation of its condition and decide what is needed to return it to working condition.
Removing the dynamo on a Standard Big 9
มุมมอง 8714 วันที่ผ่านมา
I believe this also applies to the 1920's Standard 9, Teignmouth and big 9 MK2 and Mk3 (1931 and 1932 models)
Adjusting Tappets on a Side-valve Engine
มุมมอง 11621 วันที่ผ่านมา
In this video I show you what a side-valve engine is, what the tappets do, where they are located and how I adjust them. A pre-war Standard car is used as an example. In addition to the normal method of measuring between the tappet and valve stem an alternative way of measuring the clearance is shown, which gets round the problem of making the measurement with pitted tappets. This method may no...
Driving a car with a "crash" gearbox : Double Declutching
มุมมอง 39หลายเดือนก่อน
A basic introduction to driving a car with a crash gearbox: How the gearbox works, what you are trying to do when double declutching and some video showing theory in practice. For details of sliding mesh gearbox construction see th-cam.com/video/xsulf_yCqSU/w-d-xo.htmlsi=BF5cp3MDTQe1Nd1G
"Portanola" playing Sister Suzie's Sewing Shirts For Soldiers pianola roll Themodist TL 22680
มุมมอง 894 ปีที่แล้ว
I made this pianola roll to midi player in 2014. Here you can see how the theme perforations can be used to control the theme and accompaniment intensities and MIDI program (instrument) from piano and two configurable instruments
"Portanola" playing The Lady From 29 Palms Pianola Roll QRS 8286 1947
มุมมอง 1554 ปีที่แล้ว
Here's an introduction to pianola roll to MIDI player I made back in 2014. Shown here connected to a Yamaha electric piano. The case is made from the spool box and top deck housing from a broken Standard Pianola action. The bar across the front houses infre red LEDs which shine through the perforations to phototransistors mounted being the tracker bar. An 8 bit pic Microcontroller turns these s...
Thermionic Products (Brush) Soundmirror
มุมมอง 3456 ปีที่แล้ว
UK version of the Brush BK411 Soundmirror. It differs in that it has a separate internal power supply chassis, alternative valve line-up and no auto-rewind trip.
Brilliant video(s) - thank you so much. I've seen two videos and assume that there is a third but can't find it. Is there a third?
Thanks for your kind comment. Yes two more to come... Refurbishing then reassembly and test.
@@SuperRetroville I look forward to seeing them. Meanwhile my 6 Volt C45 dynamo is not exactly like yours and I'm struggling to see how to adjust the third brush. Do you know if there is a standard way or do they vary a lot?
@@RobertBoulstridge I'm afraid i've never taken one of those apart, mine is a 12V C45A. I have seen different methods of holding and pushing the carbon brushes and some 3rd brushes don't have a screw to move them, you just have to push the assembly round through the window. This is an extract from the Lucas book "Remove the dynamo cover band. The control brush can be moved by firmly pushing the holder by means of a suitable piece of wood. The adjustment is very sensitive, only move the brush by the width of a commutator segment before checking the output. To increase the output move the brush in a clockwise direction as viewed from the driving end (for clockwise direction machines).To reduce the output move the brush in an anti clockwise direction. The ammeter reading must not be more than 4 amperes when the head, side and tail lamps are switched on, using bulbs of the same size as those specified. This must be checked immediately on starting the engine and not after it has been running for some time."
@@SuperRetroville Thanks very much for your reply. I have worked out now how to move the third brush but I didn't realise the sensitivity nor the max. current criterion. I'll get to work!
Thanks Kev. It needed a full electronic restoration. Absolutely full of leaky waxed paper capacitors. Also it uses the same circuit as the American Brush branded machine but with wildly different valve substitutions. Variable mu valve in the record output and playback amp stage with some very odd biasing. I changed the cathode resistor to improve lineatity. Might have missed the point but i dont think so. It also uses the screen grid of that valve as an anode for monitor output during record. All really quirky if you ask me but it seems to work surprisingly well. Tape transport is very crude too. Built to a budget but eye wateringly expensive when new.
Wow, that's a super-looking machine for sure! And plays very well still super stuff! Thanks, Kev.
That is absolutely brilliant. I have an antique working player piano, and I still don't understand half of what you said in your description! So is it possible to convert worn-out old players (bellows, valves, air pumps, etc) into one of these? Is that what you did? Have you shown this to QRS?..... you might need a patent 😂
Thank you! It was a lot of work but something I had wanted to make for many years. The opportunity arose when a friend was having to get rid of a pianola where the pneumatics had been ravaged by woodworm. Really the only original parts are the tracker bar, roll transport and woodwork. All thr new guts are hidden. I wanted it to look in keeping with the era, hence the control levers kindly supplied by the late Reg Richings work electronic potentiometers inside. The whole thing could be made much more compact, but not so much fun. Its nice to be able to play my rolls without the huge pianola (shown in the other video) and I think the Yamaha keyboard sounds better. Better for the neighbours too since i can listen with headphones!
Very clever :)
Excellent, very clever . First time I have seen one like this on am electronic keyboard. I enjoyed that thank you :)
Very nice :) Thanks for sharing
Infra red LEDs in the bar in front and phototransistors behind the tracker bar. MIDI conversion done by a an 8 bit PIC microprocessor. Phototransistor outputs are registered using D type flip flops and then read by the micro. Hysteresis is applied to the inputs to mimic inertia of pianola action. Theme, pedal, mode and patch inputs are also used to generatr MIDI. Tracking is analogue servo off phototransistors at the edge. Roll motor is simple voltage speed control. I am happy to share design and code.
How does it works? What type of sensors does it uses. I want to build something like this to transform rolls to MIDI
Wow, great device! May I know what optical device and electronic you are using to decode the roll holes? I'm working on a similar device trying to use fiber optics in the tracker bar holes leading to receiving diodes. Thank you!
I used infra red surface mount LEDs in the bar in front of the roll and surface mount phototransistors mounted on the back of the tracker bar, one for each hole, driving TTL D type registers directly, clocked and read at about 1 KHz by the processor.
@@SuperRetroville Thank you for this info. How do you manage the problem with the dotted punched longer notes to avoid a lot of staccato notes instead of one long note?
The roll is sampled at about 1kHz each hole/note is assigned one bye in memory, 4 bits of which are used as up-down counters with note on and note off thresholds to provide hysteresis. The peda chainl perforations are wider apart so that input needed a bigger counter. I could have related sampling rate to tempo setting but this method worked for all practical roll speeds. Other bits in the note byte contain other note status such as theme indication. Im happy to share the code if you want it.