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Matchless transformers info- must read

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  • Matchless transformers info- must read

    Hi Folks. I got tired of trying to convince some folks that my Dad designed the original Matchless transformers, so I asked someone you might have heard of to clear it up. Here is his response.
    From Rick at Royer Labs:
    Hi Bob,

    Of course I remember you! Your deliveries of transformers were like Christmas to me. I often think about Woody and how helpful, actually instrumental, he was to the success of our company. As I’m sure you are well aware the transformers are the heart and soul of any amplifier and the transformers that were produced by your company are simply the best. To dispel any confusion about who designed the transformer sets, and I’ll include the inductance choke and power transformers as well here, it was Woody all the way. Mark Sampson and I provided the design criteria but it was your father who performed the magic and designed the superb transformers. Mark and I approached other manufacturers and commissioned samples that proved to be disappointing. We knew if we couldn’t find a designer who understood exactly what we were trying to do, we would not be able to make the amplifiers that we envisioned. We were very lucky to have met Woody at the time we did as we were about to give up, thinking the art was lost. Woody designed all Matchless transformers and incorporated design elements of the vintage transformers we were so desperate to emulate. Other manufacturers “just didn’t get it” and offered very un-musical samples. His output transformer designs for the DC30 and Lightning are pretty legendary and I don’t think anyone can touch them to this day. His power transformers were very impressive as well because he maintained very tight regulation on the output voltages. That clearly sticks out in my mind. I used to measure those suckers when they came in...every damned one of them! I don’t know what rumors or misconceptions are flying out there in amplifier land but you can be quite certain that Woody was definitely THE MAN! Anyone who has any doubt about that can give me a ring and I’ll set them straight.

    Give my regards to the folks over there at TDS.

    Rick Perrotta

    What a guy! He is a real class act, as you can probably tell. Anyway, we don't have a fancy website, actually our server has crashed! But you can reach me anytime by email. We do ship worldwide and offer a discount if you mention Music Electronics Forum. My email is kg6epv@yahoo.com
    Thanks for listening! Bob Wood, TDS
    Last edited by kg6epv; 07-20-2010, 09:30 PM. Reason: too much

  • #2
    Hi Bob,

    Thanks for the info and background! I'd highly suggest to get the website fixed and user friendly. While many people appreciate the personal touch, these days most of the people who might buy transformers want to be able to go to your website and research the product and your company at all hours of the day, and possibly also buy direct from your website, without ever speaking to you. Having a website of that nature would surely help your business and would be a great investment for you to make.

    I've never lusted after Matchless amps myself and never really wondered who made their transformers, but its great to know the true story anyway. good luck!

    Greg

    Comment


    • #3
      Thank you

      Hi Greg, and thank you for the excellent advice! I do sell them on eBay, and I used to have a website... the server crashed! i am trying to get it up now. Thanks again, see you on the boards! Bob, TDS
      PS. when it comes back up, our website is
      www.transformerdesignandsupply.com
      Last edited by kg6epv; 07-21-2010, 06:20 PM.

      Comment


      • #4
        I'd say that unless you are VERY carefully marketed that selling on Ebay with any kind of "this is the real deal" moniker is only going to damage your cred. I'm not trying to poo poo any efforts on your part, I'm just saying that that's how long it takes me to decide "Ebay, pontificance of notoriety, I'm gone". Truely. I don't think most guy's in the know trust anything anyone puts up for sale on Ebay.

        This move, contacting this forum with this info, is a very good start toward being taken more seriously.

        You could solicit many of the "amp parts" web sites with this info, and perhapd do well. But if your still selling on Ebay I think it could actually damage your rep.

        I don't know how much you count on the Ebay sales, but there could be bigger things on the horizon if you split away from Ebay. No promises, but that's how I see it.

        Chuck
        "Take two placebos, works twice as well." Enzo

        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

        "If you're not interested in opinions and the experience of others, why even start a thread?
        You can't just expect consent." Helmholtz

        Comment


        • #5
          Thank You

          Thank you Chuck. I would like to get to the point where I can sell them from our website. It will have online ordering and all once I get the software- I ordered it today. The new server is now online too. All the best! Bob, TDS

          Comment


          • #6
            Well, there was a rumor a few years ago that it was TMI or Pacific that made those trannys and I never saw a rebuttal from those folks or anyone else about it. Very cool to know what's up there.
            And, wasn't there someone selling "left over" TMI trannys saying they were original Matchless iron?
            Hey Bob, did you forget to renew or is that the old Gen?

            73 KB0TJ
            Bruce

            Mission Amps
            Denver, CO. 80022
            www.missionamps.com
            303-955-2412

            Comment


            • #7
              Hi Bruce!

              Howdy Bruce! Yes, West Labs has been selling them also. I don't know who he buys them from, but they are not ours. KG6EPV is my old call, but it has been my main email for so long I still use it. I have hundreds of contacts, it would be a pain to change email addresses. My new callsign is N6AAB. It's a vanity call, "all American boy" is a nickname given to me by local hams on the repeater. I was the newsletter editor for the Lee DeForest Amateur Radio club for years too. It was fun! Unfortunately I haven't been able to get on the air much lately, no antenna up yet at the new QTH. I am putting a mobile HF rig in my car so I can do HF mobile soon as it cools off here, hi!
              All the best and 73, Bruce! Bob, TDS www.transformerdesignandsupply.com kg6epv@yahoo.com

              Comment


              • #8
                Off topic...
                KB0TJ is my old Advanced call from... jeeze, like 1979 or 1980.... wow.
                Me too Bob... Sold our old house with ant farm and moved.
                I had to sell my 70' Rohn, rotator and triband Yagi... shunt fed on 160m (Covenants here) Still have both of my ICOM 751As a couple gronk Yaesu FT101Bs and Es, a cool old FT101ZD with WARC, a couple dozen old Hallicrafters Rcvers and a host of other fun stuff but.... been too busy to hook up any of my HAM gear and install an attic dipole with my remote tuner.
                I have the feeder and control line for the auto tuner run up from the basement through the walls to the attic and I'll get around to it this fall or winter... when it is not so darn hot up there!
                Only two or three more years till Solar sunspot Max.
                73 OM
                All American (boy) !! Cool, I'm sure a few of the other old gummers, here besides me, remember that.
                Bruce

                Mission Amps
                Denver, CO. 80022
                www.missionamps.com
                303-955-2412

                Comment


                • #9
                  Ham stuff

                  I know what you mean. One of these days I will find the time to get on the air! 73, Bob

                  Comment


                  • #10
                    Hi,
                    Has anyone heard from Bob Wood recently ?

                    Comment


                    • #11
                      Bob Wood has been very hard to contact, hope he is OK.
                      Now for the technical question about his power transformer for the DC30.
                      I bought a transformer set from Bob and built a Dizzy 30 from a Ceriatone kit.
                      Matchless advises to use either a single GZ34 rectifier or a pair of 5V4G rectifiers.
                      Bob's transformer spec sheet say the rectifier heater circuit is 5V@3 amps.
                      A pair of 5V4G rectifiers draws 4 amps to the heaters.
                      So, are the TDS PT specs conservative?
                      I just installed a pair of 5V4G rectifiers, and the amp sounds good, but I'm worried about burning up the PT.
                      What's the wisdom from the forum gurus?
                      Should I measure the heater voltage under the 4 amp load to see if it's still regulating well at 5V?
                      If so, can I assume I'm not killing the PT?

                      Comment


                      • #12
                        Do measure the voltage on the 5V wind. If it's not sagging much and the PT doesn't get too hot you're probably fine.
                        "Take two placebos, works twice as well." Enzo

                        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

                        "If you're not interested in opinions and the experience of others, why even start a thread?
                        You can't just expect consent." Helmholtz

                        Comment


                        • #13
                          Originally posted by Chuck H View Post
                          Do measure the voltage on the 5V wind. If it's not sagging much and the PT doesn't get too hot you're probably fine.
                          OK, will do that, and post the results for the 5V winding.
                          I'll also post the B+ with a range of different rectifiers, just for general info on the DC30.

                          Comment


                          • #14
                            Originally posted by Diablo View Post
                            OK, will do that, and post the results for the 5V winding.
                            I'll also post the B+ with a range of different rectifiers, just for general info on the DC30.
                            OK, here's the results:

                            Rectifier-------------Amps (nominal)------------- Heater Voltage-----------------B+
                            Weber WZ34----------0------------------------------5.20-----------------------------340
                            Weber WU4GB--------0------------------------------5.20-----------------------------307
                            GZ34-------------------2-------------------------------5.17-----------------------------350
                            5R4---------------------2-------------------------------5.14-----------------------------298
                            5AS4A------------------3-------------------------------5.14-----------------------------317
                            5U4G Old ST----------3-------------------------------5.14-----------------------------299
                            5U4GB-----------------3--------------------------------5.09-----------------------------320
                            5V4 x 2----------------4--------------------------------5.06-----------------------------348

                            So, the heater voltage regulation is 2.7% in the range of 0 to 4 amps.
                            The PT remained very cool, and I couldn't feel any heat in the heater
                            wires coming out of the transformer. Looks like the PT can safely supply
                            4 amps to the rectifier. Interesting that the B+ is almost identical whether
                            you use a single GZ34 or two 5V4. The Weber copper caps drop about 10V
                            more than the vacuum tube equivalents.

                            Comment


                            • #15
                              That looks encouraging. How long did you leave the different rectifiers in place when feeling for temp? I don't think it matters much at this point though. I wouldn't call 2.7% a significant drop. I'm not surprised by the higher voltage drop on the Weber units. They may assume a larger heater sag for smaller, cheaper amps. Ergo lower efficiency. Also, with the solid state plug ins guys may be tempted to try different units more cavalier. Too little B+ is a safe bet to keep their product from being the cause of a failure.
                              "Take two placebos, works twice as well." Enzo

                              "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

                              "If you're not interested in opinions and the experience of others, why even start a thread?
                              You can't just expect consent." Helmholtz

                              Comment

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