Reply to Thread Bookmark Thread
Posts 1 to 38 of 38
  1. #1

    User Info Menu

    I have a Peterson guitar special P100G amp (wooden cabinet) with an Electro Voice speaker. These amps were made in England. I have not used it for quite some time because it needs a check up. This Peterson is a top jazz guitar amp with an outstanding equalizer to match the different arch top or solid body guitars. I purchased the amp a lot of years ago second hand. Never came across a same amp.
    Anyone have any experience with these amps? I am looking for a repair shop in Western Europe (I live in the Netherlands now) to do the check up.

  2.  

    The Jazz Guitar Chord Dictionary
     
  3. #2

    User Info Menu

    I am trying to get my Peterson p100g up and running. I understand that the original manager of the Peterson company is "Pete Tullet" and that he still has an interest in these amps and may have original new-old-stock parts. Does anyone know how to contact him? thanks JIM

  4. #3

    User Info Menu

    after hearing MITSUKUNI TANABE (first clip in the good sounds thread) I also wanted to have a Peterson P100g !!!

    There were to on ebay Germany just last month, I bid on both but was outbid. Both sold for approx 350 euro

    New they were much more expensive but apparently most have some problems over time and are getting harder to repair since the company is no longer there

    Since you're in the Netherlands - on marktplaats there are more than 20 repair shops for guitar amps.

  5. #4

    User Info Menu

    Typical problem is quality of origjnal pots.

    Replacing is not so difficult.

    [Pots]
    Tone: H, MH, ML, L : 10KA
    Gain, Master : 22KB (or 20KB)
    I removed Master, always Max ways equal to remove, for get the good sounds, just taped the hole.
    Reverb : 10KA

    In my case,
    1. replaced only the Ch1, I don't use the Ch2.
    2. Pots: TOCOS(Tokyo Cosmos) RV24YN20S. ??24??for panel mount.
    (original is ?20?for PCB.)
    I changed the place of PCB a littel.


    Bset regards kawa
    __________________
    Last edited by kawa; 02-03-2011 at 05:57 PM.

  6. #5

    User Info Menu

    Circamstances in Japan???????? ?peterson p100g - Google ŒŸõ
    Tube like fat & round jazz tone : FET, Ev EVM10L or Em ME10-1008 (Eminence type is good for jazz guitar)
    Enough Power:100W
    Compact: Helpful stage work,space(bigband etc),carrying
    I'm using now on big band for every events.

    Very popular in Japan !!!
    Still expensive even the used.

    also my past posting from "Good Sounds" #136
    Two Rare Birds Jazz Guitarists Will Love - Premier Guitar
    (writers mistake; P100G is 10" speaker !!!)

    The peterson amp has two typical problems, bad pots and relays contact.
    I replaced to TOCOS(TOKYO COSMOS) pots(RV24YN20S) and OMRON relay(G2R-1A-E).

    from the thread "What is your Jazz Setup" #35
    Settings
    Guitar:Gibson '67 ES-175DN V8 T10
    Strngs:Gibson SEG-1040ML
    Shield Cable:Belden 9778
    "Amps & Settings" Amps were tilted by legs or stand.Sound check point was flont of speaker(Mic set point)
    Fender '66 Vibrolux Reverb(Speakers Jensen C10NS):T2 B3.5
    Fender Twin Reveb 100W(Speakers:Rola): T1?2.5 M6?8 B1?2 Master Max(Equal to without master)
    Fender Twin Reverb '65 Reissue(Speakers: Eminence):T1 M6?8 B3
    Peterson P-100G-MkII(Speaker:Eminence ME-10):Gain 1?3( Volume use) L/MIn M1/Min M2/-4 H/-2 Master/Max(Equal to without master)
    Polytone MIni-BruteII: Master/Max B/+1 M/+2 T/+1 Gain/2?4(Volume use) Contour/10?11( O'clocK) Program/edge Tone color switch/
    Center
    Peavey Envoy 110(speaker:Bule Marvel)(Ser.G0113936):Modern mode B3 M2 H0

    Important things: Balance for solo tone and backing tone.
    LIke to guitar,not like to electric piano.

    __________________
    Last edited by kawa; 01-01-2014 at 06:35 PM.

  7. #6

    User Info Menu

    Hello,
    I'm repairing a Peterson P100G guitar amp at the moment.

    Is there any chance anyone has the schematics for this amplifier?

    Also, is there any contact available for Pete Tulett?

    Thank you so much

  8. #7

    User Info Menu

    kawa is the guy who knows this amp. I have corresponded with him via this forum over the last couple of years. The Peterson amp is an _excellent_ sounding amp for jazz. After listening to the jazz clips on YouTube from Japan I have developed a serious case of GAS over the Peterson.

    Of course, I do all of my own amp tech work, so dodgy pots are of no particular consequence to me.

    Good luck in your quest for a Peterson. Here is a clip of Tanabe on his Super-400 into a Peterson (superb):

  9. #8

    User Info Menu

    Hi Greenstone,
    I in the quest for the schematic of the amp so I can repair the unit I have at the moment.

    Thanks

  10. #9

    User Info Menu

    I've got it. You can call me at 401 419 0621
    jim

  11. #10

    User Info Menu

    Quote Originally Posted by Jim Bastian
    I've got it. You can call me at 401 419 0621
    jim
    thank you so much

    pm sent

  12. #11

    User Info Menu

    Great amps !

    Here's a nice clip of Howard Alden using a Peterson, with great shots of his old Howard Roberts model.


  13. #12

    User Info Menu

    Hello,

    I'm repairing this amp and I'm looking for the schematic.

    Thanks in advance,

    Marc

  14. #13

    User Info Menu

    Unfortunatelly I was still not able to repair my amplifier,
    it has some noises in the preamp section,
    I did a video of the problem, please check it out:



    If anyone has suggestions or tips that could help me please let me know

    thank you so much

  15. #14

    User Info Menu

    without knowing the particulars of that amp..and how that noise was made..was guitar plugged in??

    i'd say the first thing to check...and this goes for many modern amps..esp ss amps...many times the input jack is a type soldered directly to the circuit board...with plugging and unplugging the guitar, the solder develops hairline cracks...and noise like that occurs


    if your input jack is indeed soldered directly to the circuit board,check it carefully...usually a resoldering will take care of it...or better yet get a non circuit board mounted switchcraft input jack and wire it to the board..or have ur tech do it

    luck

    cheers

  16. #15

    User Info Menu

    I'm sorry. You should be able to find a good amp tech who can diagnose/repair this amp, even without a schematic. Amps are not all that different, when you get right down to it. A good tech can put it on the bench, look at it, scope it and figure things out pretty quickly.

  17. #16

    User Info Menu

    Quote Originally Posted by neatomic
    without knowing the particulars of that amp..and how that noise was made..was guitar plugged in??
    sorry, the details are in the video description I should have posted them here:

    I'm trying to fix this amplifier, it has some random noises that randomly blow. the noise are with the guitar plugin in or not. It doesn't matter if the guitar has volume or not also. I guess the problem is from the preamp because if I plug anything into the Power amp only the noise disappears. Also, I'm using an Audio probe at the moment, and the last preamp opamp's output just before the Power amp has the noise there, so it should be before that. If you have any tips or experience in fixing Peterson guitar amps let me know something Thank you so much

  18. #17

    User Info Menu

    Quote Originally Posted by Greentone
    I'm sorry. You should be able to find a good amp tech who can diagnose/repair this amp, even without a schematic.
    I'm a good amp tech.
    The amplifier was already checked and abandoned by 2 good amp techs before me.

    Quote Originally Posted by Greentone
    Amps are not all that different, when you get right down to it.. A good tech can put it on the bench, look at it, scope it and figure things out pretty quickly.
    Quite wrong mate.
    Amplifier circuits can be quite different, specially solid state circuitry.

    Quote Originally Posted by Greentone
    A good tech can put it on the bench, look at it, scope it and figure things out pretty quickly.
    Wrong again mate.
    Difficult boards and layouts, boards with no component identification silkscreen, intermittent problems.
    All of that together make some repairs really difficult and taking a long time.

    "Figuring things out pretty quickly" is not the norm in the repair world, that's the norm of what the inexperienced costumers think

    Regards

  19. #18

    User Info Menu

    check that input solder joint!...if noise is in the preamp section, that is the first thing (literally) to check

    luck

    cheers

  20. #19

    User Info Menu

    Quote Originally Posted by neatomic
    check that input solder joint!...if noise is in the preamp section, that is the first thing (literally) to check

    luck

    cheers
    The noise is coming from an amplifier section, not from the input jack.
    The noise is the same with the input jack disconnected from the circuit pcb

  21. #20

    User Info Menu

    coulda said that the first time!! haha

    cheers

  22. #21

    User Info Menu

    Quote Originally Posted by neatomic
    coulda said that the first time!! haha

    cheers
    Did you listen to the noise in the video?

    that type of noise is not from an input jack, if it was any simple fault with the input jack the amp would be fixed already 2 years ago

  23. #22

    User Info Menu

    Sounds like it's assassociated with that last chip. What IC is it?

  24. #23

    User Info Menu

    always nice to try to help..and get pissed on...luck bub

    if after 2 years u havent fixed it, ur not as mighty as u think


    pretty arrogant for 8 posts

    and jackweed, thats exactly the sound u get from a bad input jack!!

  25. #24

    User Info Menu

    Quote Originally Posted by neatomic
    always nice to try to help..and get pissed on...luck bub

    if after 2 years u havent fixed it, ur not as mighty as u think
    pretty arrogant for 8 posts

    and jackweed, thats exactly the sound u get from a bad input jack!![/QUOTE]

    No one pretended to be mighty, and I'm sorry but you don't know much about amplifiers circuit noise.

    moving on, if someone had the same problem in a Peterson amp please let me know something.
    If I fix the amp in the meanwhile I will report back and tell my findings so that they can help others in the future

    thanks

  26. #25

    User Info Menu

    yeah nice comeback, einstein

    see you in two years,
    when your posting broken peterson amp in our for sale forum

    cheers

  27. #26

    User Info Menu

    Quote Originally Posted by neatomic
    yeah nice comeback, einstein

    see you in two years,
    when your posting broken peterson amp in our for sale forum

    cheers
    I don't really know why you are acting like that.

    I understand that you tried to help, I understand that you gave your best based on your knowledge,
    thank you neatomic.

    I wish that I can fix it in the meantime and share the knowledge

    thanks

  28. #27

    User Info Menu

    I've sent the video to my electrical engineer who seems able to fix anything. Hopefully he will have a suggestion.

  29. #28

    User Info Menu

    Hi everyone,
    I was able to repair the Peterson P100G amplifier yesterday.

    As I spent so many hours on this amp and circuit, I did a thread explaining the common problems and failures and also tips on how to service this amp. This can be helpful in the future for other people while they are servicing Peterson amps, specially because there is not much info around and it's also not an easy amplifier to service.

    I posted the Servicing Tips in another forum, a technical one, here is the thread:

    Solved - Repairing Peterson P100G Guitar Amp - Preamp Noise

    Thank you so much Kawa and Jim Bastian for all your help

    Peterson guitar amp-kkx8rfy-jpg

  30. #29

    User Info Menu

    So glad you got it fixed! These rate as top shelf jazz amps!

  31. #30

    User Info Menu

    Hi there,

    After coming across a listing for the Peterson Bass Master P150, I started looking for information about these amps, which frankly I'd never heard of before. I found Mr Bastion's website and the pages about the Peterson's and got quite excited that I'd accidentally stumbled on to something a bit special. I live in Dubai, where the market for used amps is pretty small at the best of times, and for something like like these Peterson Bass Masters, well I suspect this maybe one of only a handful in the whole Middle East.

    Now this old girl has some issues, the low input is dead as a door-nail (could be broken solder, could be any number of breaks), and the gain pot is a shambles (I'm hoping its just the pot) but that aside the tone on her is all buttery purring magic. That ElectroVoice speaker is a real treat.

    In the worst case scenario, I'll have to bust out the soldering iron and screwdriver myself - but I'd much rather take her to a professional amp tech for a service, and look at the input and gain problems, but given the relative scarcity of these combos, I'd be grateful if anyone had a schematic for the P150/P200 that I could take along with the old girl to give the tech a head start?

    Many thanks in advance for your help.

    Peterson guitar amp-img_0661-jpg

  32. #31

    User Info Menu

    Just wanted to keep this thread alive. Just found a 120 that is on the way!! Should be able to use it on my Peterson web page. My p100g that i got from howard alden is still doing great after a decade of service.

  33. #32

    User Info Menu

    A little late, but here is a zip file of the Peterson P100G schematics.
    The power amp on page 5 is interesting. It is pure class B with no bias to help the crossover between the two power FETs.

    I seem to remember that it was possible to hear the crossover distortion fizz on the tail end of a note.
    Attached Files Attached Files

  34. #33

    User Info Menu

    Hello Jim.

    I thought I had several html pages I downloaded a few years ago on the Peterson guitar amp - I have a Peterson 100 which I bought from Adrian Ingram, a well known jazz guitarist from Leeds). The pages evidently came from a site called 'Jazz Guitar Hardball'.

    The Peterson links don't work anymore but I'm wondering if this site is actually yours, because your name appears in several of the files in the folders I downloaded! I am a bit confused as your question implies you don't know where the guy Tullet (sp?) lives, but there's an address, phone number etc in those pages. The company in question (at least in 2010) is Neutronics in Essex, London-ish. I seem to remember having the circuit diagrams but I can't see them anymore. Maybe you had them and my html files linked to them...damn.

    I have had small things go wrong a couple of times but nobody found it difficult to fix and the sound certainly is still as rich and lovely as it ever was. I did have the reverb made permanent though - it originally worked with a footswitch - and changed the speaker to a more portable Eminence Blue.

    Jeff.

  35. #34

    User Info Menu

    Hi, I too have a P100G that I bought a fw years ago, but sadly the previous owner had replaced the EV speaker with something cheap and nasty ! I see you comment about replacing yours with an Eminence Blue. How have you found it - tone-wise? What was the model number of the Eminence Blue, (if you have that info) !

    Thanks for any help,

    Kind Regards

    Les Morton

  36. #35

    User Info Menu

    Hi Les - sorry for the delay. I haven't worked out how to use this forum yet. There doesn't seem to be an alert to responses to posts that I can see.

    To answer your question, all that there is to see is the blue paper backing to a speaker, called Eminence, Made in the USA, but with an address in Wakefield England. There is an old fashioned phone number 0924 279297. I guess you'd have to put a 1 before the 9 in the dialling code, assuming they are 1) still in existence and 2) are even in the same place! But, they used to be well known enough.

    The sound is great and I think the replacement was done by an experienced jazz guitarist who would know his onions, soundwise.

  37. #36

    User Info Menu


  38. #37

    User Info Menu

    Allso Eminence Version mounted ME10-1008 Which without Ev plate on the front grill.

    I like Eminence Version.
    Last edited by kawa; 02-28-2020 at 09:44 PM. Reason: correction

  39. #38

    User Info Menu