Look in unlikely places. The safest way to operate this type of radio is with an isolation transformer Available from Antique Electronic Supply.
About Us The Canadian Vintage Radio Society is dedicated to the preservation restoration collection and enjoyment of antique radios and related items.
. Speaking of AA5 radios you should use an isolation transformer when powering these up so you dont electrocute yourself. The CVRS is a non-profit society run solely by volunteers. Jan Thu 16 2020 1229 am.
These service type isolation transformers have both secondary wires isolated from ground. One last step that is often needed is an alignment of the radios RF. Antique Electronic Supply shipped it fast.
Take care in operating such radio and you test equipment as serious damage can result to your equipment without the use of an isolation transformer. Wise Ones A longtime electronics hobbyist Im new to tube radio restoration. If you are the Elmer with boxes of electronic junk hanging around sure you.
By Wildcat445 Wed Jul 10 2013 1234 am. With the isolation transformer it means that the sets chassis may be grounded very helpful when. If you have advice about isolation transformers or about the.
Universal output transformers are available which have multi-tapped primary and secondary windings to match a wide impedance range. For safety reasons it is recommended that a 11 isolation transformer be used in conjunction with the auto-transformer. Unfortunately it is a Hot Chassis radio where the line cord is tied directly to the metal chassis inside so an isolation transformer must be used in-line with the power cord while servicing.
Pack of two from Amazon is 660 after shipping I think your enclosure below is awesome. The Triad transformer runs about 15 then about another 10 for shipping. On my bench I have a stand-alone VIZ Isotap WP-26A on the left but I mostly use a home-built system on the right incorporating a 120V-120V power transformer scavenged from a piece of scrapped equipment to provide isolation followed by a General Radio Type W5 Variac tapped for over voltage with a voltmeter and ammeter on the output.
Used this to build an isolation transformer box to improve safety when working on an antique hot chassis 5-tube Crosley radio. A NOTE CONCERNING SAFETY. I bought an isolation transformerVariac at a junk store a while back for 8.
The female connector is 4 after shipping from China. It likely would make the condition worse by arking. Then the circuit breaker there would likely trip if the fault recurred.
Non power transformer radios can be a SHOCK HAZARD and even be lethal. At the moment Im leaning toward a Tripp Lite IS250 Isolation Transformer. One helpful part of using an isolation transformer is that it can allow working on a hot chassis set where one of the line power input wires usually neutral is connected to the chassis.
It seems to be a favorite amongst vintage radio collectors but at 110 its certainly an investment I want to make wisely. And it shorted a small isolation transformer could not blow the short clear. I assume that all of you use isolation transformers.
Add an acceptable-safe enclosure a power cord a switch and you have a very low power 35 VA isolation transformer for around 40-50. Safety trumps cost but I dont want to be wasteful either so knowing I should acquire an iso transformer and having two nearly identical broken-door microwaves headed for the recycler I started nvestigatiing to find out if I should build an iso trans from the. After I paid for it I educated him.
The isolation transformer keeps the line voltage off the chassis eliminating the danger of electrical shock You can operate most of these sets without an isolation transformer if you follow the additional guidelines. I have a used from Ebay Vector-Viz TC261E commercial isolation transformer which has multiple outlets marked AC low med high and DC low med high. This isolates the output power from ground because at your circuit breaker box the neutral is connected to ground.
An auto-transformer does not offer isolation from the ac line. If you choose to work with vintage electronic equipment use an isolation transformer is a MUST. You might send the radio etc back to where it came from unknowing.
The guy at the junk store did not know what it was so he sold it cheap. A quick and easy way to get an isolation transformer of low to moderate power say 100 watts or less is to use a low voltage. Incidentally the same risk is present in old ACDC series string tube radios that did not use a power transformer.
Elsewhere in this website is an article explaining how to modify those radios for safer operation. Replacement Size When replacing a power transformer consideration must be given to the power handling capabilities of the replacement unit. You can also build an isolation transformer from scratch a topic that has been discussed often in the Antique Radios forum.
The type of isolation transformer we use for radio service must isolate the output power from neutral. It is not uncommon for the vintage radio collector to have various output transformers laying about that have been pulled from parts sets or have been obtained at swap meets. Or it might not.
0 comments