View Full Version : Unknown Canadian Marconi Television.


Ruru
06-07-2026, 05:44 PM
Howdy Folks, It's been awhile since i used the forum but i do loves oogling over all the stuff posted.

That said, Today i purchased a Marconi Vacuum tube television from the flea market.. The attachments below are the photos i took of it back at my work area inside my house. It WAS plugged into the power at the flea market. I did not personally do it, I only heard about it after the fact, It was only 10 buckeroos so i thought i'd give er a try.

What i was told about the symptoms it's experiencing is, It turns on, It makes noise, there is no picture, they are unsure if that's because the tube is dead, and or, it might have a radio function, and they might've only turned on the Radio,
I am not personally interested in plugging it in and fiddling around with it to find out until the capcitors at the very least are changed. That said, If anyone could help Identify the television at all, That would be killer, Schematics or a manual would be PERFECT.

The Only information i've gotten from the television itself is, the back cardboard cover that goes on the back calls the Model TV - 2831. and the Serial number is 2495 There is a Patent dated to 1938-1955.

the Chassis casing has seen better days, It is SUPER faded. i believe it is a 'A' Chassis, from what i can makeout on it, otherwise i'm pretty clueless.

That would lead me to believe it's a mid 50s television, but that would just be my guess, It is a Canadian television.

Also. completely dumb question. there is no spring windings inside the television unlike with my RCA new vista telly from the 60s. If i were to discharge the tube which realistically would be the only way I'd be comfortable working on it, I would ground the discharging tool (insulated screwdriver with alligator clip/electical tape) to the Metal chassis frame, Or is there something special i'd have to do? I've done aton of times with arcade monitors, and consumer televisions. i've just never done it on one with no specifically dedicated spot to.

https://scontent-lga3-1.xx.fbcdn.net/v/t39.30808-6/719891718_1022967980412623_5542530882835307904_n.j pg?stp=dst-jpg_tt6&cstp=mx1536x2048&ctp=s1536x2048&_nc_cat=109&ccb=1-7&_nc_sid=aa7b47&_nc_ohc=nifIZjAqBlYQ7kNvwGXKtsP&_nc_oc=Adrenyss36N9eOqyN_cpRJaQsHqk6nQN0HqJ5ZtxMc1 WsW0dKga6sIFv-CX19IO-eXs&_nc_zt=23&_nc_ht=scontent-lga3-1.xx&_nc_gid=m6KKGmMnZUN9U8wFzcVPnQ&_nc_ss=7a2a8&oh=00_Af8Fi1EBzCGxbgXZbOBZlExJXoogj3sYOea1-bGdni8nNw&oe=6A2BD4D9

https://scontent-lga3-1.xx.fbcdn.net/v/t39.30808-6/720435707_1022968077079280_3472982213907753485_n.j pg?stp=dst-jpg_tt6&cstp=mx1536x2048&ctp=s1536x2048&_nc_cat=111&ccb=1-7&_nc_sid=aa7b47&_nc_ohc=vO7KgmR2YacQ7kNvwEzLebF&_nc_oc=AdoUnCZ7P6bpQmsNbCf4RA7j3YLAQ8VueI0nteGcLZY FI8B8ZMPlBA1l2hn8Omr3yFI&_nc_zt=23&_nc_ht=scontent-lga3-1.xx&_nc_gid=PeuUachuMkCjiExYEcHWAA&_nc_ss=7a2a8&oh=00_Af9FSvnwt5yRRMXM1UsX-F9FHcmFnNzB3UCzuzrFWODKcQ&oe=6A2BC29B

ronl
06-08-2026, 12:28 AM
Hi Ruru. You can discharge the picture tube clipping to that copper strip left of the yoke.the metal chassis is most likely ok to discharge as well.I might have your service info this set.ill check and get back to you in a day or so. RonL

ronl
06-08-2026, 12:26 PM
Hi Ruru.I have the service info for your tv.RCC manual # 19. Looks like your set is from 1956.pm me an email address to send scans to and ill get to it in a day or so. RonL

Ruru
06-08-2026, 01:14 PM
Thank you Ronl ^^ Message sent, Take your time~

Electronic M
06-08-2026, 01:55 PM
One thing that's advisable on HV discharge is to put a 1M in series with the lead to ground and hold it there for about 20 seconds.

Most CRTs will experience dielectric bounce back (they'll recover most of their previous HV) a few seconds to a minute after a dead short discharge...the resistor and patience minimizes bounce back.

I've lost count of the times I've been bit by bounce back, and I've forgotten to discharge and been bit by that too..... It's downright pleasant (the voltage and charge are roughly equivalent to a really good static zap from your houses doorknob in winter) compared to touching a yoke winding or the top cap of a horizontal output in a color set with it running (those will burn a small hole in your skin).

ronl
06-08-2026, 04:17 PM
Good point Electronic M.I got bit a few times with bounce back too.I scanned and emailed your service info Ruru.I had time today.let me know if any pages need rescanning. RonL

Ruru
06-08-2026, 06:53 PM
Got it all discharged. It's laying on it's side ontop of my table using blankets and towels to support it upright. Though at the time of writing this i put it back flat down as i accomplished everything i could so far. Cleaned up all the insulation and as much of the filth as i could on the inside. Will continues again once i'm not so lightheaded.

For the moment i took some pictures of all of the capacitors as i could. One of them crumbled immediately unfortunately. I could not figure out the value of it,

Here's a bunch of photos with their values based on what i can tell.

Self Explanatory

https://cdn.discordapp.com/attachments/1512579968486604912/1513686892950982716/a05e276e-976c-49b0-8954-8ea1ea4c6a74.png?ex=6a28a246&is=6a2750c6&hm=ae7d9a0984f477c1818fe3005ed0fee442ce6dc474e3103 9c0a2b97fdce21b95&

80 MFD - 250V?
60 MFD - 250v?
https://cdn.discordapp.com/attachments/1512579968486604912/1513687069547823234/6de833cf-6dc4-439b-b057-65b7b5576139.png?ex=6a28a270&is=6a2750f0&hm=a658ce9078fc182ddb686ffc6aa25899eb2ec72bfd8c2b0 f71d9e0bcb0ba0c52&

MFD v
25 350
10 350
15 450
100 50
https://cdn.discordapp.com/attachments/1512579968486604912/1513684152757653646/test12.png?ex=6a289fb8&is=6a274e38&hm=e9e2870199a015629d5772f330a2f269ad70eedf03c0a72 326cf36ae1ece65c2&

.01 MFD - 600V
.01 MFD - 600V
https://cdn.discordapp.com/attachments/1512579968486604912/1513686700537282772/53af8012-6aba-40dc-8d4f-57befb3ef002.png?ex=6a28a218&is=6a275098&hm=0dce26690620bcd629796553aa2fdd6a3812bae8a8371b4 8b57a0ff9cbf0dc6b&

0.05uf 600v
0.1mfd 1000v
https://cdn.discordapp.com/attachments/1512579968486604912/1513686601623015504/50303899-1fae-4cbf-aef1-54585021df59.png?ex=6a28a200&is=6a275080&hm=a5f67b30c9735ea12698c0f6867f4248b01002714ce33a5 da9ecb2788f0a61a3&

0.1uf 200v
https://cdn.discordapp.com/attachments/1512579968486604912/1513685251153465364/image.png?ex=6a28a0be&is=6a274f3e&hm=cf88ed6a9ea37e7f8f59e8de6ada95acab5d1ca5ff83662 b6bbd21d79f4c311a&

5MFD 50V
https://cdn.discordapp.com/attachments/1512579968486604912/1513685466669514762/image.png?ex=6a28a0f2&is=6a274f72&hm=8bf4d41d6186d7c6b5724a6e1491aba9966603d3a520d76 aab78d0d57148d8fe&

.05mfd 600v
https://cdn.discordapp.com/attachments/1512579968486604912/1513686435042033714/b767ffae-15f8-499a-a314-da6b164405b0.png?ex=6a28a1d9&is=6a275059&hm=35ae735cf6f83be7b04ce334f06ffaa89653aa139b1ea24 7cfc03a5675fafc7b&

0.03uf 600v
.1mfd 600v
https://cdn.discordapp.com/attachments/1512579968486604912/1513686170213548343/fcb750f6-3ac2-4782-8a74-89907680500b.png?ex=6a28a199&is=6a275019&hm=2ab6534e54259805c82e51e8279bbb124961ce742ff8ce1 8829ab631c0bfe61e&

.1(unsure) 600V
https://cdn.discordapp.com/attachments/1512579968486604912/1513687303552372776/image.png?ex=6a28a2a8&is=6a275128&hm=314b0f593d275637b7c6b61f309d34b2c3138e489b9e2ee 6cbdc8d772bb482c4&

.02 mfd 400 V
0.03uf 600V
https://cdn.discordapp.com/attachments/1512579968486604912/1513687634189353071/f321932c-34b3-4922-b1ea-e8fea371142e.png?ex=6a28a2f6&is=6a275176&hm=f2f23e8063d1e734351b9cc31f69d722f83033bd8588b5e 110cd7bf3e3af9c79&
https://cdn.discordapp.com/attachments/1512579968486604912/1513687765144043662/6b7eb651-d7ca-4148-99ec-c8ded67772ff.png?ex=6a28a316&is=6a275196&hm=81dbe54355c89768159a627375ffaad64cb2d8b3a350902 1ae0abedb4716b8b9&

4,700pf 750v
4,700pf 750v
4,700pf 750v
https://media.discordapp.net/attachments/1512579968486604912/1513687971075985418/aaf21a07-70e0-4e2f-8335-ac2b70441790.png?ex=6a28a347&is=6a2751c7&hm=18bbcab93151ee45be2d79d26e568ac84a92857f4068ff2 e7b2e97f2db391828&=&format=webp&quality=lossless&width=726&height=968

10MF 450V 525VSP?

15k 10w Sand Resistor i should probably change.
https://cdn.discordapp.com/attachments/1512579968486604912/1513688919202332922/image.png?ex=6a28a429&is=6a2752a9&hm=0d1acd8057ceb19b994555c0ddef2bd4cc7568b4c11a7a8 374695777b6d0f9db&

3.900pf - 500v
https://cdn.discordapp.com/attachments/1512579968486604912/1513690188273029291/064382e7-e16f-4970-8bb5-09a3104b1658.png?ex=6a28a557&is=6a2753d7&hm=42b8adcac33bb7b5b8be5306e1e774645f8ad1cd29d3e59 6188ce3321606a005&

Ruru
06-08-2026, 06:54 PM
.05? 600v
.056? 600V
.047mfd 600v
.047mfd 600v
https://cdn.discordapp.com/attachments/1512579968486604912/1513690706382815262/c583ca02-172f-4da7-949b-6a236a8fee58.png?ex=6a28a5d3&is=6a275453&hm=a5f7856a49d587ceb3ee181ca089cc4b4a251850d94a59f 41be5b54b43a5ef13&

And the mystery one i don't know what is.
It had A05 i think 400V listed on it from what i made out but touching it in the slightest just made it fall apart. I'm assuming it might be a .05mfd 400v cap? But that would be my honest guess.

https://cdn.discordapp.com/attachments/1512579968486604912/1513691549068820611/7c2db73f-7cbd-4a26-ad88-e7ce955310c1.png?ex=6a28a69c&is=6a27551c&hm=58c2faf85f765e828c18b50f14f943f7b26ae99a2477853 b55c135077ebe2d39&

Any help is appreciated as you can imagine i'm just taking shots in the dark and seeing what sticks.