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Sears 1422 tube amp ?

Discussion in 'Amp Tech Center' started by murphysf, Oct 11, 2018.

  1. murphysf

    murphysf TDPRI Member

    Age:
    48
    3
    Oct 11, 2018
    San Francisco
    Hello

    Just got my hands on a Sears 1422 and have the following questions:

    Anyone know where I can find a schematic?

    What was the stock speaker? How many ohms?

    What is a recommended replacement speaker?

    Does the amp have multiple output impedance taps where the speaker wire can be soldered to different point depending on the speaker load (i.e. 4, 8 or 16 ohms)?
     
  2. wanderin kind

    wanderin kind Tele-Meister

    Age:
    63
    258
    Apr 24, 2018
    Olympia WA
  3. murphysf

    murphysf TDPRI Member

    Age:
    48
    3
    Oct 11, 2018
    San Francisco
    I've tried google, spent a few hours searching and couldn't find the answers to the questions I posted, I figured that I would try and ask on a forum.
     
  4. Old Tele man

    Old Tele man Friend of Leo's

    May 10, 2017
    Tucson, AZ
  5. murphysf

    murphysf TDPRI Member

    Age:
    48
    3
    Oct 11, 2018
    San Francisco
    was a tube amp and then in the 70s became a solid state.

    I have the tube amp, it is currently apart in my garage..

    the amp in the pictures in the link you posted is a tube amp
     
  6. drlucky

    drlucky Tele-Holic

    515
    Jun 19, 2012
    Fresno, Ca
    Check your local library to see if they have a Sams Fotofacts on it.
     
  7. Mouth

    Mouth Tele-Holic

    Age:
    47
    603
    Feb 13, 2018
    U.S.
    Someone may know about them, so someone may chime in. Quick googling shows 3 variations of the tube model. Do you know which you have?

    57A14221C, 57C1422L, 57K1422L,
     
    Last edited: Oct 11, 2018
  8. Mouth

    Mouth Tele-Holic

    Age:
    47
    603
    Feb 13, 2018
    U.S.
    Want to put up some pictures of the guts while you have it apart? I'd be curious to see what's going on inside one.
     
  9. Mr Ridesglide

    Mr Ridesglide Tele-Afflicted Silver Supporter

    Dec 11, 2009
    Bloomington, MN
    Some of the schematics are known by the chassis number. Also, some of those amps had schematics taped inside the cabinet...
    Do you know or can you read the chassis number?
     
  10. Wally

    Wally Telefied Ad Free Member

    Mar 17, 2003
    Lubbock, TX
    That is a Danelectro-built D40XL..if my memory has the nomenclature correct. It came with an 8 ohm Jensen speaker. I can't say that I have ever seen a schematic, but a good tech would not need one unless an amp has been hacked. OT taps can be seen....if they are there. It has been a while since I owned the only example of this amp that I have seen....I liked it.
     
    Silverface and Mr Ridesglide like this.
  11. Silverface

    Silverface Poster Extraordinaire Platinum Supporter

    Age:
    66
    Mar 2, 2003
    Lawndale CA
    Wally beat me to it!

    It was made by Danelectro and badged "Sears" instead of the usual "Silvertone" . Model 40XL on the front panel; model 1422 on the back. I worked on one about 20 years ago. Not too many in existence.

    I'm assuming you don't work on your on amp if you're asking these questions.

    Take it to a qualified amp tech. The existing speaker DC resistance can be measured and if it has the usual EIA codes you can look up the maker and year. If there's NO speaker the OT can be tested to determine the impedance requirement, and multiple taps will be obvious. As far as a good replacement, without knowing the tube complement there's no way to even guess at the output - but looking at pictures it seems to have 2xEL84 or EL86 outputs, probably running around 15 watts maximum. That tells you (roughly) the power handling.

    I have looked for a schematic for about 20 years and have not found one. But a tech won't need one.

    I hope you budgeted $200+ for service. ANY old tube amp needs to be checked out right away, as nearly all have old...even original...filter capacitors that need to be replaced whether the thing works or not they only have a 15 year service life and if one blows it can cause very expensive damage), voltages checked, probably a few small parts are off-spec and at least a few new tubes will be needed. Tis amp will be more expensive to service than other Sears/Silvertone models, Fenders and other common amps due to the lack of a schematic. And if it's NOT working don't be shocked by a $3-400 repair and service bill, since the circuit needs to be analyzed a bit to determine test points.

    Make SURE you tell the tech to replace the filter caps if they are old - working or not. Some only do requested work.
     
    Wally likes this.
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