Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Results 1 to 11 of 11
  1. #1

    Member Sales Rating: (0)

    Join Date
    Feb 2011
    Location
    Sykesville, Md
    Posts
    1,444

    Default Amp and/or Preamp problem

    Amp= Conrad Johnson MF2200 (solidstate)
    Pre= Conrad Johnson PV2 (tube)

    When I turn on there is no sound for about 30 seconds or so. Then it kiicks in. Previously it was doing this but only in left channel.

    After sound starts all is fine.

    Any ideas??
    I got static in my head
    The reflected sound of everything

  2. #2

    Member Sales Rating: (13)

    Join Date
    Aug 2006
    Location
    St. Louis, MO
    Posts
    1,524

    Default

    Cold solder joint somewhere?
    SDA SRS 1.2TL's w/ RD-0198's, Sonicap, Mills, Armacell, SDA 1C's w/Clarity Cap ESA; PA, Mills; SDA 2B TL's; SDA 2's w/RD-0194's; Monitor 10's w/peerless tweeters
    Yaqin MC-30L integrated tube amp

  3. #3

    Member Sales Rating: (0)

    Join Date
    Mar 2003
    Location
    Va
    Posts
    385

    Default

    How long have you had the preamp? Reason I ask is some tube equipment need a brief warmup.

  4. #4

    Member Sales Rating: (0)

    Join Date
    Feb 2011
    Location
    Sykesville, Md
    Posts
    1,444

    Default

    I have had the preamp for a year or two. I always turn on the pre first. I turned on and then waited a few minutes till I powered up the amp and still problem. I think it is the amp.
    I got static in my head
    The reflected sound of everything

  5. #5

    Member Sales Rating: (0)

    Join Date
    Mar 2003
    Location
    Va
    Posts
    385

    Default

    Any way you can swap an amp or a preamp? I haven't used any tube equipment but could this be a tube going out?

  6. #6

    Member Sales Rating: (0)

    Join Date
    Oct 2012
    Location
    Cinci,Ohio
    Posts
    992

    Default

    Let the pre warm up 30 minutes before turning on the amp...tubes need to get to ramp up their temp before they can operate properly. That might be the whole prob.

  7. #7

    Member Sales Rating: (0)

    Join Date
    Mar 2003
    Location
    Maryland
    Posts
    2,101

    Default

    Is there a relay in the amp circuit? Relays have a tendency to age and can cause such symptoms due to dirty contacts or mechanical wear or sticky lubricants.
    Stan

    Main 2ch:
    Polk LSi15 (DB840 upgrade)
    Parasound: C/PT-600, HCA-800II; Denon: DVD-2910, DRM-800A; Monster HTS3600-MKII, Grado SR-225i

    HT:
    Denon AVR-888, Polk: RM7, PSW10, Marantz UD5005, Panasonic TC-P42S60

    Other stuff:
    Denon: DRA-835R, DRA-825R, DCD-660, DRM-700A, DRR-780; Polk: RTA11TL (RDO198-1, XO and Damping Upgrades), S8, Monitor 5A, TSi100; Pioneer CT-6R, PL-530; Onkyo CP-1046F; Ortofon OM5E, Marantz PM5004, CD5004

  8. #8

    Member Sales Rating: (0)

    Join Date
    May 2012
    Location
    New York
    Posts
    236

    Default

    Definitely sounds like a problem with the amplifier output relay, or aging component in the relay driver circuit.
    Last edited by Glen B; 11-04-2013 at 12:31 AM.
    Main system: Denon DP-59L | Audio-Technica AT33EV | Marantz Reference Series SA-11S2 | Classé CP-50, modified | Classé CA-300, modified | Classé DR-10, modified | Classé RC-1 | PSB Stratus Gold i's | DIY Balanced AC Power Conditioner with surge/spike suppression | Acoustic Zen and NeoTech cables | Oyaide and Furutech AC power connectors and receptacles | Hi-Fi Tuning Supreme fuses | Dedicated 20A IG AC line

  9. #9

    Member Sales Rating: (0)

    Join Date
    Jun 2008
    Location
    Silicon Valley
    Posts
    5,785

    Default

    Quote Originally Posted by rromeo923 View Post
    When I turn on there is no sound for about 30 seconds or so. Then it kiicks in. Previously it was doing this but only in left channel.
    This could be normal operation, and when only the left channel was doing this then that was wrong. My Cambridge-Audio 840W amps were the same way. Turn on, and they went through some initialization phase before starting to play.

  10. #10

    Member Sales Rating: (13)

    Join Date
    Mar 2002
    Location
    The Mars Hotel
    Posts
    30,429

    Default

    I thinking a relay problem as noted by skrol and Glen B.
    'Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

  11. #11

    Member Sales Rating: (4)

    Join Date
    Jan 2008
    Location
    Salem, Oregon (Polk county!)
    Posts
    4,111

    Default

    Yep. Relay in the amp.
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:

    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion."

    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. Need Help problem with hafler dh-101 preamp
    By laotzu61 in forum Electronics
    Replies: 15
    Last Post: 12-25-2012, 02:38 PM
  2. Phono Preamp problem
    By advancedman in forum 2 Channel Audio
    Replies: 7
    Last Post: 09-01-2010, 12:55 PM
  3. "New" preamp, but I got a problem...
    By Early B. in forum Electronics
    Replies: 47
    Last Post: 01-22-2007, 11:14 AM
  4. Pass Labs X1 Preamp vs. Adcom GFP-750 Preamp
    By DarqueKnight in forum Electronics
    Replies: 8
    Last Post: 09-13-2006, 01:40 PM
  5. preamp problem
    By aequitas in forum Electronics
    Replies: 0
    Last Post: 10-13-2005, 02:47 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts