Telefunken High Com NR System Demonstration (better version)
Vložit
- čas přidán 2. 02. 2017
- Testing the obscure High Com Noise Reduction System developed by Telefunken in the 70s and 80s, trying to compete with Dolby.
Song: Alan Walker - Fade (NCS Release)
• Video
I did something like this before, bad video quality, issues with the line in and no comparison whatsoever. This replaced said previous video. If you were looking for the song in that video, it was "Too Retro" by Beat Doctor. I chose to change the song as the synthesizer in "Fade" by Alan Walker also shows the weaknesses of a companding Noise Reduction system if it is not adjusted perfectly.
Deck is a TC450M High Com from 1979, the very first High Com equipped deck ever made. Using a period correct BASF Chromdioxid Super II cassette from the same year.
This is a direct hookup, recorded on my computer's line in jack. That recording has not been tampered with.
I have not set the bias on that deck to match the cassette.. Even uses the original belt.
You can download the entire, unedited audio track recorded digitally for your own analysis here: drive.google.com/file/d/0B7xY... - Věda a technologie
Very interesting. HighCom makes a noticable difference. I'll have to make some experiments one day on my RC200, to see if I can get similar results on it.
It definitely eliminates nearly all of the noise. The one problem I have with this constellation was that the audio suffered a bit as well as the bias wasn't set to match the tape.
I did try it with a Sony Metal XR and it turned out absolutely perfectly, but I wanted to show more of a worst-case scenario here.
Also to be mentioned is that this song with its hall/echo and really moody synthesizer is more keen than everything to show falsification due to a misaligned, more sophiisticated noise reduction system.
I've been a big fan of dbx NR, but recently I've had an interest in the High Comm system. Once I get my Nakamichi units I ordered from e-bay, I'll be ready to make a demo video using a 3 head deck and dual High Comm devices. Thanks for the video presentation.
I've never experienced DBX, sure would be interesting.
That sounds really interesting! I'd love to see a High Com 2 unit being demonstrated
Thanks a lot
DBX is the best noise reduction system by far. This is why it is used in multitrack cassette recorders like Tascam's Portastudios
You can achieve CD quality on cassettes by using a combination of a DBX encoder/decoder and Pioneer deck with Digital NR (like CT-W606DR or the 806DR which I have, it's a fantastic deck)
More info about the latter here: czcams.com/video/v14AEKgX29U/video.html
That was the last wave of tape decks, I really do like the analogue imperfections. At least, the few that I actually experience with a Nakamichi RX-505 which is my main deck. Dolby C serves me well.
@@Halterung01 Here is the video demo of the dual High Com II units for a 3 head deck.
czcams.com/video/CjC4nE3cTAg/video.html
Dang! That's looking good!
Thanks! I do own the complete stereo system. It's beautiful.
I have old CC20. It has HighCom, also. It is really good system for noise reduction.
Nice
👍 ) класс!
HighCom was the own
brand from Telefunken.
Much better than Dolby.
Классный аппарат и звук чистый,имею такой в коллекции
Sorry, don't speak Russian.
Great device and the sound is clear, there is one in the collection
Yeah; showing off a Noise reduction system superior to Dolby is one thing. Getting to study and appreciating its logic is another.
Frank Koslowski What do you mean? This is just from a consumer's standpoint.
Hey, it's still better than shoving a 1000° hot knife into stuff.
Wow. I've got a High Com deck but it doesn't work. Belts are gooes up. Head is worn. PITA to take apart. This inspired me to give it a try for repair.
Nice incentive.
Ask away if you have issues along the way. :)
@@Halterung01
Thanks, well I re-belted it and it sounds fine now, I left the old head in for now as it still sounds alright. The only problem is that sometimes when you turn it on one channel is too quiet, then you turn it off & back on again and it comes back. Probably some corroded micro switch or relais but unless it gets worse I won't bother.
@@westelaudio943 Just seen this now. This sounds to me like either a DIN/chinch switch on the back or the internal rec/play switch.
sounded better with the filter off :)
Due to the bias the tape got, the deck would have needed to deliver a higher output current.
Thing is, on a 2head deck that doesn't have bias or level adjustment on the front, it is impossible to calibrate it internally for all different kinds of cassettes.
On Dolby B this would not have been an issue as it's basically just an EQ.
High Com is a compander and therefore very dependent on calibration.
This was meant to be a real life test, not something optimized just to show how it could work.
This shows how it did work in most cases.
@@Halterung01 sure, it worked to get rid of the noise. but you lost a lot of high end detail and i think the method of compansion effects source too much.
Eu quer
Does this deck flip the cassette and play the other side automatically?
Nope, this deck does not have any implementation of autoreverse.
Thanks. much appreciated.@@Halterung01
My suggestion if not recommendation according to my experience as a cassette user since 1976 till to this very day is that if someone owns more than one cassette deck and different brands of course in order to injoy all recordings from all decks being played in the other decks is to record without any dolby at all because most of times cassettes been recorded with bolby C especially sound perfect when played at the same deck which have been recorded :
Now as about the tape hiss if someone knows how to record a cassette and i'm referring for the recording level to choose how high or low someone wants to record a cassette without dolby it depends 1st from the cassette in how good condition is , most preferable blank unused cassettes , 2nd how good the cassette deck is , and 3td the kind of music in order to record without dolby and having less audiable hiss :
I don't know if you agree with me dear P vB ??
but most of all if i made my self clear using my poor english ?
Thx for any response :-)
Where to start?
If you have more than one machine it takes some serious mechanical skill in adjusting both machines to correctly play the other's recordings.
I'm in the lucky position that all of my current machines are adjusted in a compatible way and they all support Dolby C. (This Telefunken is currently not in my possession but I use it sometimes)
It has taken years for this to work like it does but it's still not perfect.
Some tapes just don't play in one of three machines for some reason but these cases have become rare.
But I indeed used Dolby C for all of my around 500 homerecorded cassettes. And it works. After years of it not working.
@@Halterung01 Thx :-)
deve ser bom .mesmo ..vc tem que engolir que dolb.y eh melhor db.x tmb .Gostaria de comparar com super arns (anrs)Victor nippon .. dnl Frits Philips .en
no tape deck's
r/s 60 db chrome k7 sansui deck
X
.. philips cd 921
playing cd music vougue madonna
Panasonic recorded pv 4760 4860 ag1980 .Resultado superior 87db r/s VHS hi .fi (Yes !!)
Sounds better without noise reduction. hiCom is useless just as Dolby is. Nobody ever turn that sht on.