Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: x44d80 on September 30, 2015, 01:55:10 pm

Title: Need advice on Stereo Amp to play vinyl
Post by: x44d80 on September 30, 2015, 01:55:10 pm

My son dug out all my old vinyl records. We have equipement to play them, it's just not very good.  I was going to buy a old Pioneer, Marantz or Kenwood solid state amp but I started thinking why not just build a tube amp.  Heres the problem.  The only kits I can find are Dynakit, and one from the Tube Store.  Too expensive or too small.  I cannot find any info or schematics to build your own.  I bid on a Fisher 500 tube amp that needed work but didn't win the auction.  The question is would you buy and repair a tube amp or build your own?

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: jjasilli on September 30, 2015, 05:48:43 pm

Possibilities are endless & mind boggling.  Google Williamson amplifier.  Can't go wrong with a Dynakit.  Numerous old schematics to copy like from Heathkit.  I personally like to rebuild

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: p2pAmps on September 30, 2015, 06:18:12 pm

Quote from: jjasilli on September 30, 2015, 05:48:43 pm

Possibilities are endless & mind boggling.  Google Williamson amplifier.  Can't go wrong with a Dynakit.  Numerous old schematics to copy like from Heathkit.  I personally like to rebuild

There is always a tube McIntosh

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: Jack_Hester on September 30, 2015, 06:23:48 pm

Get yourself one of these: 

http://www.ebay.com/itm/Magnavox-Stereo-175-67-Tube-Amp-Amplifier-6V6-12AX7-5U4GB-P-P-Push-Pull-Works-/181887696552?hash=item2a5959fea8 (http://www.ebay.com/itm/Magnavox-Stereo-175-67-Tube-Amp-Amplifier-6V6-12AX7-5U4GB-P-P-Push-Pull-Works-/181887696552?hash=item2a5959fea8)

And, find a nice Heathkit or Realistic stereo pre-amp to go with it.  I have a Mag 175 and a Realistic pre-amp, both I've tested and am pleased with the results.  I have a Technics SL-1800 direct-drive turntable for the front end.  All working, but not assembled into a finished stereo.  A friend pointed me to a nice set of table-top speakers that really complement these components.  I'll have to get the model number for them tomorrow. 

All this would make a great project for your home stereo. 

Jack

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: mresistor on September 30, 2015, 06:30:07 pm

https://tubedepot.com/products/tubecube-7-stereo-vacuum-tube-amplifier (https://tubedepot.com/products/tubecube-7-stereo-vacuum-tube-amplifier)

http://www.triodeelectronics.com/st70buildkit.html (http://www.triodeelectronics.com/st70buildkit.html)


but there are a bunch of old ones on ebay

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: p2pAmps on September 30, 2015, 06:42:12 pm

http://www.tubes4hifi.com/bob.htm (http://www.tubes4hifi.com/bob.htm)

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: mresistor on September 30, 2015, 06:43:59 pm

http://www.triodeelectronics.com/diy35kit.html (http://www.triodeelectronics.com/diy35kit.html)


lots on ebay


http://www.ebay.com/itm/Dynaco-Stereo-70-Tube-Amp-Amplifier-/291573176538?hash=item43e31d98da (http://www.ebay.com/itm/Dynaco-Stereo-70-Tube-Amp-Amplifier-/291573176538?hash=item43e31d98da)

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: x44d80 on October 11, 2015, 08:47:36 am

Thanks for the replies and advice.  How about something like this?
http://www.ebay.com/itm/ROCK-OLA-414-418S-418SA-JUKEBOX-Tested-Working-TUBE-AMPLIFIER-39310-/331668564651?hash=item4d38fcaaab (http://www.ebay.com/itm/ROCK-OLA-414-418S-418SA-JUKEBOX-Tested-Working-TUBE-AMPLIFIER-39310-/331668564651?hash=item4d38fcaaab)

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: sluckey on October 11, 2015, 10:03:16 am

I don't recommend that specific unit because it does not have a power supply. The power supply is located on another unit. However, that same seller has other Rockola amps for the same price that do include a built in power supply.

Something to consider... These old juke box amps 'may' be designed for a ceramic phono cartridge. If so, you will need an external preamp to use a magnetic cartridge.

Title: Re: Need advice on Stereo Amp to play vinyl
Post by: x44d80 on October 11, 2015, 12:37:49 pm

Good advice.  Thanks so much!