OK, I'll try to upload it again. There's also a copy in one of my dropbox public folders. User name "wirelessjohn".
Hitachi TRK-8080E Line in/DIN problem...
- Thread starter netstable
- Start date
- Status
What I've encountered using DIN, its a LOT more sensitive than RCA line in. When most RCA line ins need the MP3 player playing on full blast, some of the DIN (PB/REC) can distort if volume is set higher than "1". Crown CSC-850L for example, needs my player to be around 3-6 (volume goes 0-40). The Palladium doesn't need even that.
My cord is connected to pins 1 (L) and 4 (R) and to the metal housing (signal ground).
My cord is connected to pins 1 (L) and 4 (R) and to the metal housing (signal ground).
I had an Hitachi in 84 that had 5 pin DIN. Only connections were outputs as inputs didn't function, however.... You have mic inputs and i believe if you attenuate the output off the mp3 player with a basic voltage divider in each signal line. 120k ohms x 4 if memory serves me wrongly.
DIN also had a different impedance too so Line levels were different, plus the leads being different too. #nightmare
DIN also had a different impedance too so Line levels were different, plus the leads being different too. #nightmare
It's not the way really.Reli said:
I wonder what was the purpose of this socket, or maybe it's some production flaw. It seems like the standard of din did not change through years. It shouldn't require amp. BTW, how about other boomboxes from the period (late 1970s), do the line-in din sockets work loud and clear? I thought about Panasonic or Sanyo.
From Service Manual of Hitach TRK-8080E
Input sensitivity and impedance of DIN
30mV 50k ohms
I think it's normal but have to search and compare with other gear.
I’ve had no luck with 5 Din equipped Hitachis. I had to import an RCA equipped Hitachi TRK-8080 from the US to get one with a usable line in.
I think, it's better and cheap to buy stereo preamp board and attach into boombox.
I haved one boombox with similar problem and I use
stereo preamp board to resolve problem with line level:
https://boomboxery.com/forum/index.php/topic/7879-phono-inputs-line-inputs-etc/?p=167376
You must search for similar board in electronic shops in your town or in ebay:
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2053587.m570.l1313.TR0.TRC0.H0.TRS0&_nkw=stereo+preamp+module&_sacat=0
I haved one boombox with similar problem and I use
stereo preamp board to resolve problem with line level:
https://boomboxery.com/forum/index.php/topic/7879-phono-inputs-line-inputs-etc/?p=167376
You must search for similar board in electronic shops in your town or in ebay:
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2053587.m570.l1313.TR0.TRC0.H0.TRS0&_nkw=stereo+preamp+module&_sacat=0
I have a Trk-8600 and when I first connected an ipod I found the sound too loud and distorted. I Have a few
5 pin din to phono leads and used the 1st one lying around . A few days later I tried again with a different cable and it played fine?. Found the second cable wired different and wired into pins 3,5 and 2. I now have an internal bluetooth module connected to these pins and it is excellent after sorting out the earth loop hum
5 pin din to phono leads and used the 1st one lying around . A few days later I tried again with a different cable and it played fine?. Found the second cable wired different and wired into pins 3,5 and 2. I now have an internal bluetooth module connected to these pins and it is excellent after sorting out the earth loop hum
Probably been answered already but to check that the problem exists across all sources you plug in via din, try another device like a separate tape deck with DIN out for example. That will play at standard line level output from the headphone jack, so just hook your 3.5mm to the deck and plug the DIN into the 8080E. If it's quiet then you know you might need to re-wire the DIN cable or the problem could be with the pre-amp itself.
- Status