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Too bad we cant get clamp on miniature DC scope probe or dc ammeters at pauper prices; then a guy with a running SX-17 could just peep inside the B= wiring.

I've seen other transformers with this frequency range. Covers 400 and 800 Hz used in aircraft. By memory ( and could be wrong) PAECO stands for Palo Alto Engineering Company and was bought by

Thank you for that suggestion. I can probably remove the rectifier valve and disconnect the heater circuit for the same effect. Then again, I will probably have to remove the valves anyway...

John , my tendency is to take it up on a variac and watch the primary milli-Amps, often with the rectifier or maybe all tubes removed. Just a small magnetizing current should show up if it is

I finally managed to pry open the lid at the top of the receiver. It was seized with age and at first I didn’t want to use too much force so as not to cause any damage. However, opening it up was

Well, he says sheepishly, this is true for the Thordarson, 50-60 cycles.? The PAECO frequency range is from 50 to 1000 cycles.??I still think the PAECO is the all around winner, if this is a

Lee – You have that completely backward. – 73 – Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 908-902-3831 Sent: Thursday, May 30, 2024 5:28 PM To:

Yes. according to the catalog, 50-60 cycle Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy

Other way around, the low frequency transformer must have more iron. There may be additional losses in a tranformer at higher frequencies but generally 50Hz will run fine at 60Hz. Where

Jacques, you must have your good binoculars in-use. I was reading the tests box. Yes it says 50/60 under the core diagram and it says 50/60 ,127va on top of the 3D drawing of the transformer too.

You can run 60 cycle transformers on 50 cycles but you can't run 50 cycle transformers on 60 cycles.? A 60 cycle transformer has more iron in it then one for 50 cycles. Lee, w0vt

It seems to me that most 60Hz power transformers will perform OK on 50Hz although they may run hot. -- Richard Knoppow Los Angeles WB6KBL SKCC 19998

Don, please read the .pdf more attentively. Just at the right of the GRY – ELECTROSTATIC SHIELD, what do you see ?? 73, Jacques, VE2JFE in Montreal De : [email protected]

Since the radio is in the UK, it would need to operate on 50Hz mains. Looking at the data, the Stancor appears to be for operation on 60Hz, whereas the Thordarson catalog states that the 22R05

Jacques, as I read it this is a 60 Hz , nota 50 Hz unit Don Sent: Thursday, May 30, 2024 1:59 PM To: [email protected] Subject: Re: [HallicraftersRadios] Halicrafters SX17

Another possible replacement is a Hammond 372DX. See attached. 73, Jacques, VE2JFE in Montreal De : [email protected] <[email protected]> De la part de don

Jim, are these 50 cycle ? Sent: Thursday, May 30, 2024 11:18 AM To: [email protected] Subject: Re: [HallicraftersRadios] Halicrafters SX17 transformer John There are various

JohnThere are various catalogs from replacement transformer manufacturers, I looked at STANCOR and THORDARSON, for example.? There are others.? I have not looked at my junque box so there are still

I completely forgot about noting the current on the low voltage windings! I added up the heater currents and arrived at the same 3.9A that you did. In addition to this, according to the data-sheet,

JohnCathode current flows through the cathode resistor developing the cathode voltage.? Knowing any two one can calculate the third using Ohm's Law. Using the maximum plate / screen grid currents