Wow that should be real nice on 6m. If I recall those have a peak out put of 410 watt's right so 820 if life is feeling short.........LOL I thought about picking up some NOS 4CX250B's but I got a good line on some HV Transformer's and well it is harder to find HV transformers at a good deal then NOS tubes.....So Transformers it is. In fact tomorrow I am
making a 2 hour drive one way to go and get them......Not perfect since they where designed to power 5-6 Sweep tubes but I figure I will get 2-3 tomorrow and 2-3 next pay day and I will be good to go for a while..... I will use use 2-3 for each HV supply for the price I am
getting them for 3 of them will cost me 1/2 the price of having one custom wound for me "yes I got quotes" and it will cost me 1/5 the price Peter Dahl wanted. Every single company that sent me a quote was 1/3 to 1/2 the price of Peter Dahl and they where given the exact same specifications in voltage and amp needed in CCS and the same specified core design, core material, weight, and case style. Peter Dahl will never see a dime of my money as long as other reputable companies exist in the USA that will make a transformer for me!!! I specified 2500V @ .800ma CCS Most of the quote came in at about $280 that is the average of all of them from high to low baring Peter Dahl. PD wanted $485 @.800 $585 for 1 amp I think it was and all where given the same primary voltage of 120V 60cps.
Ihave not slept in about 65 hours I suffer from terrible insomnia it comes and goes so I might be a tad off on the second rating on amperage from PD........I laughed so hard when I read it that I almost fell out of my computer chair. If I had been on the phone with them it would have been a bad scene........I mean really $280 versus $485 to $585....It is no wounder people are trying to use MOT to power their rigs.......I would try 4 of them in series and paralleled to get the voltage and current I needed and full wave rectifier action going on before I would drop $585 on a transformer!!!
For the record I only sent request's for quotes out to companies in the USA California, Illinois, New Jersey and Michigan I think it was.....So not like the price of copper and steel is going to be radically different or the price of machinery or labor........Since none of them where off the shelf parts all custom designed to order I doubt they would import the part but I hope not.
Nothing is more irritating to me then to be charged a premium for a name......That has always irritated me.....I do not mind paying a premium if I am
getting a part made with better materials, to higher levels of precision etc......I make custom articles for people all the time so I understand hand made!! Everyone use's hypersil high silicone steel in the core's Nickla Tesla invented that a long long time ago and the patent ran out equaly long time ago........No one is making modern high voltage transformers with iron or plain carbon steel or solid bars of material as in non-laminated etc.....not as a norm....I am
sure someone has a black smith out back beating scraps of iron together and drawing their own copper wire in the basement for some arcane reason but it is not the industry norm from what I was told by companies that only make transformers for industry from mass produced to one-of's.
So a lot of smoke is being blown.....Even though I told each company that toroidial would be ok if it made it easier for them to manufacture a custom transformer for me or if it made it cheaper for them to do so no-one in the USA sent me a quote for a toroidal wound transformer they where all E-I and C cores! I also told them that they could use non-high silicone steel and all of them told me the same thing they only use high silicone steel for custom made high voltage transformer's!!!! So it was not an option I had to pay more for as no one builds them any other way it seems!
So that is my experience shopping for 2500V transformer's @ .800ma output from 120V primary made in America. It was so frustrating and such a pain that I thought I would share it......Oh on top of that I think Ameritron MFJ sells a transformer with about the same output and all the taps for $247 so go figure??? I have no idea about their quality or where they are made. I have not called them yet because I want full specifications on the transformer if I can get them instead of trying to work backwards from their literature on their Amp's and based on their tube model and count....
What is my point??? Keep and open mind, consider all your sources,wait for quotes to roll in it took about 5 days for some but we did have a major holiday. Use the resources that come with the ARRL hand books on CD room. If one supplier is $200-$300 more for similar item I think one has to really think twice about what you are getting for that Delta V in price that is a huge difference in price point!!!!