Electrohome HR1 Four Channel Balancer Teardown - Page 1
Forum section: electronics / general

author: Lance
author_rank: Frequent Contributor
timestamp: February 02, 2012, 12:25:12 am
content: I got some of these from a family friend recently. This weekend I'm going to keep working on making these do things. My next video will be explaining how it operates.

author: vk6zgo
author_rank: Super Contributor
timestamp: February 03, 2012, 02:31:34 am
content: Electrohome! Canada's finest!-----AAAARRRRRGGGGHHHH!VK6ZGO

author: Lance
author_rank: Frequent Contributor
timestamp: February 03, 2012, 03:15:06 am
content: Quote from: vk6zgo on February 03, 2012, 02:31:34 amThey made some pretty good stuff. I was actually surprised to learn they still exist.

author: vk6zgo
author_rank: Super Contributor
timestamp: February 03, 2012, 04:39:31 am
content: I spent many miserable hours fixing their Black & White picture monitors.After a while,you got your head around the strange way they did things,& it wasn't so difficult.I always felt,though, that I would rather spend time on a"full on" broadcast standard Sony Colour Picture mon,(including convergence),than on a 12" Electrohome B & W.VK6ZGO

author: Lance
author_rank: Frequent Contributor
timestamp: February 03, 2012, 01:23:54 pm
content: I haven't seen too much other gear that was made by them. All I know about electrohome is that they used to make a lot of TVs and other such equipment.

author: Wartex
author_rank: Frequent Contributor
timestamp: February 04, 2012, 10:34:02 pm
content: Quote from: vk6zgo on February 03, 2012, 04:39:31 amJust to let you know, you can use forum signature feature so you don't need to type out your callsign every time you post. Also, we can clearly see it in your username. What is it with HAMs plastering their callsigns all over forum pages (not just this one, i mean ALL forums regardless of topics)? Is there a purpose, or is it some kind of occupational habit? I'm not a HAM so please enlighten me (I'm not being sarcastic).- Wartex.-----------------------------------The message above has been brought to you by Wartex. For more messages from Wartex, please look for "Wartex" in the forum post.Wartex.(now I'm being sarcastic)

author: vk6zgo
author_rank: Super Contributor
timestamp: February 05, 2012, 06:51:36 am
content: Quote from: Wartex on February 04, 2012, 10:34:02 pmValid point,it's probably because most hams have got used to signing their callsign at the end of the posting because it is common practice on QRZ.com,& eHam,& they just carry it over without thinking about it.As for using the callsign for their identity,again,that's just habit---It's easier to use it than to think up some snappy monicker like"Blue Wombat"or something, quite apart from the fact that such names sound like "CB-ers"Quite a few people on this forum sign their posts,although,some,like the Sarge,call themselves something completely different.Cheers,Bryan

author: Lance
author_rank: Frequent Contributor
timestamp: February 06, 2012, 04:23:18 am
content: Would you happen to know what they were using in their amplifers during the fifties?

author: vk6zgo
author_rank: Super Contributor
timestamp: February 06, 2012, 06:47:29 am
content: I would guess that the balancer was much later than the fifties---maybe '70s or even '80s.Electrohome always did look a bit "retro" even when new.I only know the Pix Monitors,though.The Hi-fi industry went through a stage,back in the 1970s,where they were pushing "quad stereo".This wasn't as far as I can remember,using any kind of encoding,but was direct 4 channel audio from special 4 channel acoustic discs("Gramophone" or "Phonograph" records).It entailed 4 separate speakers,which would have been controlled with a device like the ones you have.I wasn't into domestic audio equipment at the time,so have only the vaguest idea of how they were set up.If you get the chance to chat with an OF who was into Hi-fi then,you will probably learn more than I ever knew!Cheers,Bryan

author: Lance
author_rank: Frequent Contributor
timestamp: February 06, 2012, 01:28:16 pm
content: Sounds good. I'm hoping I can use it for X/Y input without having to rewire it. I'm going to be making a video about it later this week hopefully.

author: baljemmett
author_rank: Unknown
timestamp: February 06, 2012, 02:49:46 pm
content: Quote from: vk6zgo on February 06, 2012, 06:47:29 amI think the two most 'popular' systems were CD-4 and SQ -- they're certainly the ones I've seen most mention of when looking at 70s-era receivers. CD-4 used a 30kHz carrier to carry L/R difference channels on top of the L/R sum channels pressed as a standard stereo pair, whereas SQ used phase shifts to matrix the four channels down to two. Looked like clever stuff, but I think I'll stick with SA-CD for my future surround audio needs

author: Lance
author_rank: Frequent Contributor
timestamp: February 07, 2012, 05:08:05 pm
content: Well if quad stereos weren't really made until later, then what's with the date code I found?