Jolida 302a HELP!!

nikolas812
nikolas812 Posts: 2,915
edited February 2008 in 2 Channel Audio
I just received my jolida 302a tube amp today and I am haveing some problems. I am not getting any sound. I am starting to get worried. i don't have a clue as to what to look for. First off let me tell what has happend so far. I unpacked the amp and set in my rack. I read and reread the manual many times. I connected the speaker cables. Put in all new tubes. I let it warm up for a good 30 minutes. Then I biased the tubes. I biased them all a around 41 - 42 millivolts. I then plug in the rcas and started to turn up the volume and nothing. I don't have a clue. Please help I am freaking out!

Edit for pics:

http://Picture088.jpg
http://Picture090.jpg
Post edited by nikolas812 on
· Share on FacebookShare on Twitter

Comments

  • RuSsMaN
    RuSsMaN Posts: 17,987
    edited February 2008
    Try a different source input? You didn't connect the rca cables with it powered on, did you?
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
    · Share on FacebookShare on Twitter
  • nikolas812
    nikolas812 Posts: 2,915
    edited February 2008
    No. Ok heres where I am. I decided to keep the new power tubes in and put in the old pre amp tubes and power driver tubes. Volia! It works. I narrowed it down to the Groove tube 12ax7-m pre amp tubesthat were the culprit. So now I have the new JJ's for the power tubes and the mullard 12at7's for the power driver tubes and I am using the old united elctro tubes in the preamp section. The Jolida DOES NOT like the 12ax7's. What am I supposed to use in the pre amp section? The manual says a 6dj8 tube type is required. Is that not in the 12ax7 family? I just poped the groove tubes out of my jolida1301 hybrid so I know they work. Unless I damaged them taking them out.

    So whats going on? Did I damage my groove tubes or are they the wrong tubes?

    Also who the hell is united elctro.? Are they good or bad? They say made in england on the side of them.

    Ok so I did some research and it appears that the 6DJ8's are not the same as a 12ax7. So now for another question. Can someone recommend some 6DJ8 tubes?
    · Share on FacebookShare on Twitter
  • RuSsMaN
    RuSsMaN Posts: 17,987
    edited February 2008
    No more tube rolling / pulling / installing for you! You need to read up, you're lucky you didn't damage the amp. I like the JAN Phillips 6922 for an all around good 6DJ8. Low price, good bass, mid and top end. Not the air of the Amperex BB's, but a better bottom end in most circuits.

    For now, just sit back and enjoy the tunes.

    Cheers,
    Russ
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
    · Share on FacebookShare on Twitter
  • marvda1
    marvda1 Posts: 4,901
    edited February 2008
    the 302a is the same as the 302b which uses 12ax7 and 12at7 per the jolida website:
    "Tube Complement: 2 matched pairs (4) of 6CA7/EL34 power output; 2 pcs. 12AX7 pre-amplifier; 2 pcs. 12AT7/ECC81 power drivers "
    was this unit modded by someome?
    Amplifiers: Norma IPA 140, MasterSound Compact 845, Ayre v6xe, Consonance Cyber 800
    Preamp: deHavilland Ultraverve 3
    Dac: Sonnet Morpheus 2, Musical Paradise mp-d2 mkIII
    Transport: Jay's Audio CDT2 mk2, Lumin U1 mini
    Speakers: Rosso Fiorentino Volterra II
    Speaker Cables: Crystal Clear Magnum Opus 2, Organic Audio Organic Reference 2
    Interconnects: Crystal Clear Magnum Opus 2, Argento Organic Reference 2, Argento Organic 2
    Power Cables: Argento Organic Reference, Synergistic Research Foundation 10 and 12 ga.
    Digital cables: Crystal Clear Magnum Opus 2 bnc, Tellurium Q aes, Silnote Audio Poseidon Signature 2 bnc
    Puritan PSM156
    · Share on FacebookShare on Twitter
  • BaggedLancer
    BaggedLancer Posts: 6,371
    edited February 2008
    Speaking of tube rolling in jolidas......RUSSSSSSSSSSSSSSSSSSSSSSSSSS
    · Share on FacebookShare on Twitter
  • nikolas812
    nikolas812 Posts: 2,915
    edited February 2008
    marvda1 wrote: »
    the 302a is the same as the 302b which uses 12ax7 and 12at7 per the jolida website:
    "Tube Complement: 2 matched pairs (4) of 6CA7/EL34 power output; 2 pcs. 12AX7 pre-amplifier; 2 pcs. 12AT7/ECC81 power drivers "
    was this unit modded by someome?

    Thats what the site says but not what the manual says. Had I known this I would have never bought the 12ax7's. Oh well. I get to go tube shopping again.:D

    I am sure glad nothing happened to my amp.:o

    Right now I am just enjoying what I got.:)
    · Share on FacebookShare on Twitter
  • BaggedLancer
    BaggedLancer Posts: 6,371
    edited February 2008
    Just send me the 12ax7's.....np
    · Share on FacebookShare on Twitter
  • nikolas812
    nikolas812 Posts: 2,915
    edited February 2008
    Nope. I am sure I will have something in here that will require them eventually. So far there the best sounding 12ax7's I have had. But I've only had two other types.:o Ei elites and some chinese type. They kllled the Ei's if you ask me.
    · Share on FacebookShare on Twitter
  • nikolas812
    nikolas812 Posts: 2,915
    edited February 2008
    RuSsMaN wrote: »
    No more tube rolling / pulling / installing for you! You need to read up, you're lucky you didn't damage the amp. I like the JAN Phillips 6922 for an all around good 6DJ8. Low price, good bass, mid and top end. Not the air of the Amperex BB's, but a better bottom end in most circuits.

    For now, just sit back and enjoy the tunes.

    Cheers,
    Russ

    I noticed you mentioned the Amperex's. I am actually looking a getting a pair of NOS Amperex with the orange O lettering.

    How would these compare to the BB's? I noticed they are about a dime a dozen.
    · Share on FacebookShare on Twitter
  • marvda1
    marvda1 Posts: 4,901
    edited February 2008
    just got off the phone with bill baker at response audio, the original 302a from 1994 did use 6dj8's. try some 7308's or nos tesla's (not jj).

    try the tunsol reissue ecc803s gold pins for your 12ax7's in your other amp.
    Amplifiers: Norma IPA 140, MasterSound Compact 845, Ayre v6xe, Consonance Cyber 800
    Preamp: deHavilland Ultraverve 3
    Dac: Sonnet Morpheus 2, Musical Paradise mp-d2 mkIII
    Transport: Jay's Audio CDT2 mk2, Lumin U1 mini
    Speakers: Rosso Fiorentino Volterra II
    Speaker Cables: Crystal Clear Magnum Opus 2, Organic Audio Organic Reference 2
    Interconnects: Crystal Clear Magnum Opus 2, Argento Organic Reference 2, Argento Organic 2
    Power Cables: Argento Organic Reference, Synergistic Research Foundation 10 and 12 ga.
    Digital cables: Crystal Clear Magnum Opus 2 bnc, Tellurium Q aes, Silnote Audio Poseidon Signature 2 bnc
    Puritan PSM156
    · Share on FacebookShare on Twitter
  • nikolas812
    nikolas812 Posts: 2,915
    edited February 2008
    marvda1 wrote: »
    just got off the phone with bill baker at response audio, the original 302a from 1994 did use 6dj8's. try some 7308's or nos tesla's (not jj).

    try the tunsol reissue ecc803s gold pins for your 12ax7's in your other amp.

    I am looking at some NOS orange label Amperex and some Telefunken NOS tubes on ebay. The Tele's are $100.00 a pair. I just don't know enough about tubes yet to know if this is a good price or not.:( I think I might just watch the orange label Amperex's and see if I can get them for $40.00 or $50.00
    · Share on FacebookShare on Twitter
  • BaggedLancer
    BaggedLancer Posts: 6,371
    edited February 2008
    I'll keep watch on those 12ax7's for you to make sure nothing happens to them...just send them to me.
    · Share on FacebookShare on Twitter
  • marvda1
    marvda1 Posts: 4,901
    edited February 2008
    here's a guy on audio circles that has a couple of 6922/6dj8/7308 tubes for sale at a good price.
    http://www.audiocircle.com/circles/index.php?topic=48613.msg453883;topicseen#new
    Amplifiers: Norma IPA 140, MasterSound Compact 845, Ayre v6xe, Consonance Cyber 800
    Preamp: deHavilland Ultraverve 3
    Dac: Sonnet Morpheus 2, Musical Paradise mp-d2 mkIII
    Transport: Jay's Audio CDT2 mk2, Lumin U1 mini
    Speakers: Rosso Fiorentino Volterra II
    Speaker Cables: Crystal Clear Magnum Opus 2, Organic Audio Organic Reference 2
    Interconnects: Crystal Clear Magnum Opus 2, Argento Organic Reference 2, Argento Organic 2
    Power Cables: Argento Organic Reference, Synergistic Research Foundation 10 and 12 ga.
    Digital cables: Crystal Clear Magnum Opus 2 bnc, Tellurium Q aes, Silnote Audio Poseidon Signature 2 bnc
    Puritan PSM156
    · Share on FacebookShare on Twitter
  • nikolas812
    nikolas812 Posts: 2,915
    edited February 2008
    Thanks! I'll give them a look.
    · Share on FacebookShare on Twitter