I just got a Eico regulated power supply but without the schematic or any doc. The C- and the VAC all work fine, but the high voltage. Was cleaning in the basement a bit this afternoon, and stumbled across the schematic for this old Eico power supply on my work bench that’s. This is a classic filament, bias, and regulated high voltage power supply, great for testing and experimentation with tube equipment such as.
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About half of the resistors were out of tolerance so I changed them all. Ekco that I turned it back on using the variac. Visit your account to find out Find all posts by MadMan. Likewise, I used two UF in series in the screen supply, which was the winding that failed in my old power supply.
All buyers shall rely solely on their own investigation and inspection of any Goods. I acquired this power supply and decided to do a restoration. I also replaced all of the E-Caps.
EICO Variable DC Power Supply V Restored | eBay
Have any questions about this item? Get daily email alerts when new items become available that contain the following category and keywords. In addition to stacking the diodes, I installed fuses for 1003 secondary winding. For the price of a quality ultrafast diode from a reputable supplier — approx cents each for a Fairchild UF 1A, v — this protection is a bargain.
A full invoice should be emailed to the winner by the auctioneer within a day or two. I then followed the cal procedure and all worked out well.
Some just barely, but still good. I completely forgot that this thing was tube driven. The bias supply 6X4 is a half-wave circuit, so I used two in series.
Buyers must eifo prior to bidding at any auction sale.
Log in or Sign up. This website discusses repair of electronic items. I opened it up and found the 2 80uf E-Caps were leaking. The Gear Page is run by eifo for musicians. Likewise, series diodes sum their voltage ratings, so the circuit is more robust anyway. This is a half-wave circuit that was rectified by one original 1N silicon diode.
EICO 1030 Variable DC Power Supply 400 V Restored
I installed an ICL to limit inrush current at power-on. On to the full restoration.
The power transformer has a separate winding that supplies screen voltage to the 6L6 pass tubes. Not only that, but you can put current mfg tubes back in the equipment and eifo use it.
The first section of the DPDT switch replaced the original in the same manner. The tubes in such equipment are usually high quality, and are usually operated well within their ratings so they stand a good chance of having life left in them. First, I fused the center-tap of the HV winding 1003 a ma fuse mama fuse should be reasonable in this circuit. All content is the opinion of the author and not intended as advice. They checked right on the money.
Sure enough it worked! Webcast bidders will be charged a Home Forums Recent Posts. There were 3 other caps which I didn’t replace because they checked very good. Goods weighing more than pounds must be removed by a qualified, insured rigger. Where I could, I went up in wattage.
Regulated Power Supply 1030
That’s a country of origin you don’t see very often. Yes, my password is: In many cases, a shorted cheap component such as diode or filter capacitor can ruin a very euco or sentimental piece of equipment. Jul 3, 4. Prev Group Next Group. Without limiting the generality of ekco foregoing, Buyer shall restore and repair all real and personal property that is altered or damaged as a result of Buyer’s removal of the Goods. Share This Page Tweet. Browse All Upcoming Auctions Buyers acknowledge that an auction site is a potentially dangerous place, Flammable, noxious, corrosive and pressurized substances may be present.
Just used tubes, then. Pulled the cover off, and they’re all factory labeled — a 7-notch 5AR4 Mullard Blackburn? The applied voltage is much too low to indicate whether the diode is shorted. They all checked in the good range. What items have you won or lost?