Hi Guys: I am close to completing a new amplifier, using a pair new 3-400Z's I have carted around since 1969. I have run into a situation today that is at this time puzzling me, and I need advice. Th
Hello to All, and Thanks! I have received a number of responses, both public and private and all are helping ! Here is the current situation: I have verified the tank coil inductance, using a CHY 24
To All: Thanks for the many valuable posts in regards to my dipping the Pi-Net output circuit. I have read each and every one and learned a bit in the process. Steve, this last post of yours has caug
To All: I have received quite a bit of welcomed advice, again, thanks to all who have taken the time to make suggestions and recommendations. A little more information was requested on this amp desig
To All: I am now getting good results, that at least respond in a logical manner to all adjustments made. Story is below: This morning I inspected and cleaned all connections. I then made up a plate
Larry: I recently built an amp using two of the 3-400Z Eimac tubes. While in the process, I realized the new old stock Stancor 5 VAC 30 amp filament transformer provided 4.66 VAC under load, with a 1
Hello Bob: Just got back from the 4th weekend, and noticed your e-mail and the commentary on the B&W 852 tank coil. I just finished an amp using this tank coil in April of this year, so I hope I can
Hello the List: I wanted to share with all the approach I took for the linear amp I put on the air last spring. I used a 5 KW pole transformer for the plate supply. This was a unit that was designed
Bob: I purchased the LDG AT-100 AMP package and installed it in an amp using a pair of 3-400Z's I will have to say it was expensive, since they had discontinued the original package, but it did a gre
Chuck: I would suggest you look at the Brother line of label makers. They are low cost, high quality label printers that should meet your needs. I use a Brother PT1280, with a clear background tape.
Hello to All: I feel that one can use the available literature that Eimac published decades ago on this topic. If you go to their web site, they currently list an article on exactly this topic. To cu
Cecil: Not having heard the tone of the buzzing, I am taking a shot in the dark. However, I have had two pieces of older equipment, 35+years old that also buzzed. I finally found on the first one aft
I have used pole transformers since 1968, running them backwards so to speak as you have decided to do. As long as you follow the proper voltage and current of the original transformer design, you wi
Hello to All: Here is the problem I am dealing with. I built a home brew amp using a pair of Eimac 3-400Z's, which I obtained brand new in 1968. I hauled them around for years, became active again in
To All: I have built amplifier's where I calculated the specific needs for inductance for the tank circuit. I then tried several ways to measure what was then used in the tank coil, simply to verify
Hello the Group: I accept the fact that a few rocks will be thrown, but allow me to describe my source for a 5 Kw plate transformer. About in 1996 I started building large Tesla Coils, in the 15 Kw i
Charles: Another alternative you might want to consider is simply going to an Office Max or Office Depot and buying a Brother label maker. I used this approach on my last Linear, built 4 years ago an
Hello Denis: I have seen many HV supplies using similar oil filled caps, however not this specific model. The oil filled cap is a reasonable approach to your needs. However, my suggestion to you is t
Hello the Group: I am working on an Alpha 78 with three 8874 triodes, that are still in good shape. This particular amp was one that was built in late 1980, and the interior is in like new condition.
Hi Larry: You have several alternatives that could work for you, so here is one more. How about a boost/buck transformer wired into your HV transformer primary? You would need approximately a 10 amp