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MQ introduces a new limited series of output tranneys
205.188.116.9 |
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Posted on May 14, 2004 at 08:31:51 | |
Hi folks: Here is a newly designed series of output transformers that I've wanted to build for a long, long time. The aim of the series is twofold. First is to offer a transformer for folks who are bi-amping and don't need the huge inductances and core capabilities of say our FS-030 output transformer. The second aim/goal was to make it good enough (full range) to serve as a high quality entry level output trans. But... I did not want to do the so-called "universal" type output trans... where by mischeivious juggling of voltage ratios you make beleive that your trans is at one time a 2.5K, 5K or 10K trans.... physics just doesn't work that way or co-operate with that strategy in most cases... yet... I wanted some flexibility in the design... so here is what Robin Hood and I came up with....
5,000 ohm pri with 50% UL tap 8 and 16 ohm secondaries 80 madc unbal current capacity 20 henries of primary L 15 watts @ 50 hz power capability small signal response (varies a bit with source impedance) should be good from about 25 hertz to 25,000 hertz minimum. recommended applications: high current 300B
5,000 ohm pri with 50% UL tap 8 and 16 ohm secondaries 60 madc unbal current capacity 30 henries of primary L 10 watts @ 45 hz power capability small signal response (varies a bit with source impedance) should be good from about 25 hertz to 25,000 hertz minimum.
plate volts 350 grid bias -76 dc plate current 50 madc 5000 ohm load impedance 6.2 watts output second and third HD; -30db and -45db respectively Here is a second example from WE for 300B plate volts 400 grid bias -87 dc plate current 60 madc 5000 ohm load impedance 8.3 watts output second and third HD; -30db and -46db respectively
RH-40 5,000 ohm pri with 50% UL tap 8 and 16 ohm secondaries 40 madc unbal current capacity 40 henries of primary L 5 watts @ 30 hz power capability small signal response (varies a bit with source impedance) should be good from about 15 hertz to 25,000 hertz minimum. recommende applications: this configuration is designed to support the 45, 71A and other similar triodes.
RH-PF this is the paralell feed Robin Hood. 5,000 ohm pri with 50% UL tap 8 and 16 ohm secondaries ZERO madc unbal current capacity greater than 200 henries of primary L with M6 12.5 watts @ 20 hz power capability small signal response (varies a bit with source impedance) should be good from about 10 hertz to 25,000 hertz minimum. recommended applications: many, many known applications Please note: the parallel feed version can be custom built on nickel lams or the new generation "domain refined" silicon steel laminations. Inquiries preferred by phone for this option. ******************************************************************** These are really nice coils... and we didn't skimp much in the goodies department. All of the RH series are made with teflon insulation on the inside. All soldered connections are made with silver bearing solder. All units are housed in a brass channel frame with easy to solder to lugs.
so... if your interested... you can sign up for your choice of the RH models outlined above for $75 each.
1) delivery will be four to six weeks out.... please don't send me an email in four days asking if your order has shipped... it will not have been shipped this early.... 2) these are only available through MQ directly... you must call or email to get on the list. we accept payment via paypal or USPS money orders only. Paypal address for me is acrosound@aol.com my phone number is 215-288-4816. feel free to ask any questions on the forum here re: the RH series.... and if you guys can help fill in some apps for the differing models that would be much appreciated....
Mike |
So you can have your CAKE and eat it..., posted on May 14, 2004 at 09:02:10 | |
Posts: 4081
Joined: March 28, 2001 |
Great thing you're doing Mike! Cheers, |
How do you use the UL tap on parellel feed?, posted on May 15, 2004 at 07:56:51 | |
This sounds really interesting to me. Thankx Michael |
Thanks, Mike! (nt), posted on May 15, 2004 at 11:56:06 | |
Posts: 174
Location: Mililani Joined: November 6, 2000 |
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OOOHHH!, posted on May 15, 2004 at 23:09:45 | |
The 'lil one looks good for me, I'll probably be in touch. Question! What material did you use for the lams? |