dcgillespie
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Apr 27, 2017 at 3:07 PM
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Location:
Ball Ground, GA
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Restaurant owner

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dcgillespie

Fisher SA-100 Clone, from Ball Ground, GA

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Hi Mike -- If you will, please contact me via regular PM to discuss. Message size is very limited with profile posts. Dave Jan 7, 2017

dcgillespie was last seen:
Engaged in conversation, Apr 27, 2017 at 3:07 PM
    1. Patrice B
      Patrice B
      Sorry Dave,

      It's Patrice, I thought "conversations" were the original P.M....
    2. dcgillespie
      dcgillespie
      Hi Mike -- If you will, please contact me via regular PM to discuss. Message size is very limited with profile posts. Dave
    3. mldabinga
      mldabinga
      Hi Dave, Several AK members recommended you as a person (wizard, guru, etc.!) that could restore a Fisher X-202-B amplifier back to life....would you have time in the near future to take a look? I live in Warner Robins and travel to North GA several times a year....so I could bring it to you. Please advise, thanks! Mike
    4. ogie
      ogie
      Hi Dave
      How can I contact via pm.... I can't find it listed here anywhere. User error I'm sure.

      Thanks- Doug
    5. streetwise
      streetwise
    6. Moman
      Moman
      Hi - I have my 1962 Fisher Futura III RE: the front pilot light on the bottom front of the cabinet. Released the pilot light's yellow/black wires from underneath the cab - there's a recess the black tube that holds the #47 fits in - was there an outer light bezel? Does the #47 bulb remove from the tube. Tube rotates 360 on the base - did I damage the bulb's connection when I tried to remove? Thanks, Mo
    7. Moman
      Moman
      Hello All, New to the forum - have a 1962 Fisher Futura III stereo 660 amp/480 tuner with mpx 70. Won't power up. The 3 amp fuse on the amp appears blown. I realize something caused the fuse to blow. DCGillespie, The console is located in rural Georgia at my parents, can't locate anyone qualified to look at it. I've removed the 3 units, cleaned the tubes pins/wring - nothing. Would appreciate any help. Thanks, Mo
    8. johndoe10
      johndoe10
      Greetings Dave, and how are you? I have an issue with a HH Scott 299A amplifier, it seems to be producing too much gain to the point of over modulating and causing distortion at the speakers. This occurs even when the volume pot is only turned up a pinch. Any Ideas as to what could be causing this issue? Please let me know.

      Thank you,
      Jim
    9. dcgillespie
      dcgillespie
      njmpmcc -- Contact me through regular PM -- the ability to respond here is quite limited. Dave
    10. dcgillespie
    11. Fitzgreen505
      Fitzgreen505
      Hi Dave: I'd like to put an EFB into my Fisher 400, but I'm still not sure what components go into the EFB circuit. Perhaps I've missed something. Is there a schematic somewhere? Are you selling one?
      Thanks. Fitzgreen505
    12. njmpmcc
      njmpmcc
      Dave - I contacted you about 18 months ago about you updating/reconditioning my original Fisher 400, Serial #72,094, but you were busy. Would you please put me on it for working on my 400. It as been "resting" since about 1975, with the exception of a short ~1 minute run to check out its potential.. No problems then. As I am close to you in Roswell, I can bring the unit up to you any time.
    13. leland331
      leland331
      Hey Dave, I'm doing some research and trying to put plans together to build an amp using transformers from an eico st-40. I am going to stay with the 7591 output tubes and will drive them with an ecc83 and a 6sn7. I would like to do something a little bit better than a simple cathode resistor and regulated screens.Then I came across EFB. Is there a way to implement it without getting too complicated? Thanks
      1. View previous comments...
      2. dcgillespie
        dcgillespie
        The change in current draw from 0 to full power doesn't change as much with cathode vrs fixed bias, but it does still change.

        Use cathode bias, but use the EFB screen grid regulator to power the screens. That will keep the screen grids locked into place relative to the plate supply regardless of the current they draw.

        You'll find examples of the EFB screen grid regulator in my Fisher 400 and X-101C threads.

        Dave
        Nov 2, 2015
      3. leland331
        leland331
        I reviewed your schematics and it seems to make overall sense to me. Couple quick questions though.
        I'll use your sa-100 as an example. the screen regulator portion, the source of FQP9n50c is attatched to the bias supply which i dont have. Do i omit that part of the connection?
        Nov 3, 2015
      4. dcgillespie
        dcgillespie
        Correct. Then you can tailor the resistor supplying the Gate to produce the screen voltage you want.

        Dave
        Nov 3, 2015
    14. dcgillespie
      dcgillespie
      Hi Jim -- I am happy to help with your Pilot, but must tell you that at this point, I'm about 2 months out with firm commitments with existing clients -- after that, it's just inquiries, but of course the holiday season will be upon us by then so it's very hard at this point to establish a definite time I could do the work.

      Please understand that I am not trying to put you off in any way. But I wouldn't be fair to you if I told you to send it, and it just sat here for several months. I simply don't and won't work like that. I will be happy to put on on the waiting list, which costs nothing to do. This work is purely a hobby to fund my hobby, so if someone falls out of line for some reason, it doesn't affect me one way or the other. Everybody else just moves up. I'm sorry this may not be as quick as you would like, but this year has kept me jumping from right out of the chute. If you would like me to place you on the list, just let me know, and thanks for the interest!

      Dave
    15. jgsulliv
      jgsulliv
      Hi Dave, I'm in contact with Redboy regarding an original condition Pilot 232 he has listed on Bartertown. I'd love to have it but it needs to be refreshed/ restored before it can be put into use. I asked him to recommend someone to restore the amp and he pointed me to you.
      Are you taking on restoration work and, if so, would you be able to tell me a price range for a top quality restore? If you are taking new work, I'll ask Nate to send the amp directly to you, if that works for you.
      Keeping my fingers crossed,
      Best,
      Jim Sullivan
      (201) 303-4141
    16. Gregg7230
      Gregg7230
      Hello, I'm a new member and I just brought a sa-100 yesterday off eBay. I want to use this unit mainly to listen from my headphones. I'm in NY and apartments dictate discreet listening. Also I wAs unaware that I needed a pre-amp( just so anxious to score one). Superampman suggested a Emotiva control freak. I was thinking of a little bear p5. Any thoughts or suggestions you may have would be greatly appreciated. Again my main usage would be listening to headphones from my I-devices/digital sources. I want to thank you in advance for all the work you've done on them and if your selling kits or anything else please inform me of how they can be obtained. Thanks again and good night.
    17. adedeluca
      adedeluca
      Dave
      You can reach me at adedeluca@aol.com
      I really love this 200 B
    18. adedeluca
      adedeluca
      Dave
      You really know your fisher tuners
      I just got my father in laws 200B playing
      It is incredible
      I have only one Mullard 12At7 working in the output stage ,the other one just stop working
      Can 12Ax7 s be used there? Which brand do you remeconmend

      Thanks
    19. dcgillespie
      dcgillespie
      Hi Carl - Thanks for the kind words! Probably the most material I've written about the ST-70 is a thread entitled "Dynaco ST-70: Baseline Testing". It covers the complete design of the ST-70 from A to Z, pointing out its strengths, and weaknesses. If I only did one modification to the ST-70, it would be to convert the power supply to SS operation as addressed in that thread. Both the performance and durability of the amplifier will be greatly improved. There are an incredible number of modifications that can be done to the ST-70. Having a good understanding of the performance that the stock design represents will help you immensely in deciding what modifications might be best for you.

      Thanks for the interest!

      Dave
    20. Eulipian
      Eulipian
      Aloha from the 5-O Dave. I read the thread on the Dynaco ST-70. Whew! As a total noob most of it was over my head, but I did get some of the signal about the weakness of the single tube rectifier and wonder what you ended up doing, if anything. I am a weak person and got excited, thinking I could follow along with whatever mods your science suggested. Of course there was one on ebay and I paid too much for it, but that's not your fault. I have a number of questions and wonder where you start with a project like this after verifying values? If you could point me to your most relevant post, I'll save you the time of a reply. This is a great resource and you are obviously maximally skilled and not interested in magic parts or subjective assessments. This is my first tube amp. Ironically, I own and assembled a Hafler DH200. I was not aware of his involvement with the Dynaco. Thank you for any response.

      Carl Varady
      Honolulu HI
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    Location:
    Ball Ground, GA
    Occupation:
    Restaurant owner
    Kids are grown, I'm single, and enjoying life!

    VT audio and cars!