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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Share This Page Tweet. This transformer failure caused me to consider how unprotected most transformers are in vintage gear. I fused the screen winding with a 62ma slo-blo fuse, which was the smallest that I had available. I opened it up 1003 found the 2 80uf E-Caps were leaking.

Cleaned all the pots and the meter slide switch. Last edited by Crist Rigott; at Welcome to the New Lot Closing Notification Feature Subscribing to the Lot Closing Notification for an item will trigger our system to notify you about minutes before the bidding closes. Do you already have an account? This is a half-wave circuit that was rectified by one original 1N silicon diode.

Likewise, I used two UF in series in the screen supply, which was the winding that failed in my old power supply. We will send you a notification when the item bidding is about to end. Some just barely, but still good. No returns or refunds will be permitted, unless authorized by the seller in writing.


Jeff Gehring likes this. Ask the auctioneer a question After that I turned it back on using the variac.

Crist Rigott VideoKarma Member. I added a protection diode in series with the current meter to prevent current from reversing thru the current meter. In addition to stacking the diodes, I installed fuses for each secondary winding. About half of the resistors were out of tolerance so I changed them all.

Unfortunately, this old diode shorted and took the transformer winding with it, thereby ruining the transformer. We appreciate your help in keeping this site going. 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. Want to phone or mail the auctioneer? Repairs should only be attempted by a qualified technician. A full invoice should be emailed to the winner by the auctioneer within a day or two.

This item is part of the auction: MadMan ‘A Disgusting Brony’. Find all posts by Crist Rigott. The bias supply 6X4 is a half-wave circuit, so I used two in series.

All times are GMT Buyer shall be responsible for the safe and proper removal of any Goods purchased by Buyer. I acquired this power supply and decided to do a restoration. Get daily email alerts when new items become available that contain the following category and keywords.

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Eico 1030 HV Regulated Power Supply

Transformers can blow in the blink of an eye Recently my longtime trusted Eico regulated high voltage DC power supply succumbed to a catastrophic failure — a shorted transformer winding. Very spiffy job on the recap. All content is the opinion of the author and not intended as advice. I completely forgot that this thing was tube driven. We will send you a notification when the item is about to go up for live bidding.

Many diodes will pass a DMM diode test but are, in fact, shorted when operated at the high voltages seen in the circuit. I installed an ICL to limit inrush current at power-on. In this power supply, though, I did leave a 40ma PTC in the screen supply, which helped to mitigate inrush current and possibly added some transformer protection.

Radios For Sale

Log in or Sign up. Jul 3, 4. The applied voltage is much too low to indicate whether the diode is shorted. MKBJul 3, Jul 1, 1. The first section of the DPDT switch replaced the original in the same manner. No Info Available Payment Details: All buyers shall rely solely on their own investigation and inspection of any Goods.

Chrome DinetteJul 2, Goods weighing more than pounds must eeico removed by a qualified, insured rigger.