Hello all, I'm building a HB amp for 10 meters and am looking for the best solution to a problem I've wondered about for DECADES. Other than using a 4 conductor plug/outlet (2-120 volt, one neutral a
That's what ETO did in the Alpha 70/77 series amps. It's not strictly a NEC violation because NEC is a premise wiring and safety standard, and not a product wiring standard. Yes, another common sche
Steve... There are several ways, both of which I have used. Use a 240 to 120 volt transformer available at Mouser: https://www.mouser.com/ProductDetail/Hammond-Manufacturing/1182F240?qs=qPaGMJUC%252B
Hi steve@nr4m.com: You should think about the power supply has L1 and L2 as it's power input. If it is 120. Volts or if it is 240. Volts it doesn't matter an appropriate THREE pin plug is correct
Hello all, Thanks for the input, so far. I made a boo-boo on the transformer. it's 0, 220, 230 and 240 volt on four terminals. Steve, NR4M I'm building a HB amp for 10 meters and am looking for the
On 12/28/2022 7:27 AM, Paul Christensen wrote: "Neutral to chassis ground and ground, ground, ground everything together, and to the 240 ground coming into the power supply." That's what ETO did in t
second bond on the system." Even if there is NOT a neutral, it's created by design fault in some amps and appliances. In the case of the 70/77 series amp, there's no separate neutral conductor conne
Steve is correct, *it IS a violation for neutral to carry load current*. It used to be allowed, but code was changed many years ago, and older equipment is grandfathered. You mean ground to carry loa
That is a catch 22. The NEC for residence is not the same for a Radio Station, and R56 - Standards and Guidelines for Communication Sites. However we have a residence and a Radio Station on the same
You mean ground to carry load current? YES! Thanks, Jim _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Whats a catch 22? It really helps if you include the text your replying to. Thanks, 73, Jim W7RY On 12/28/2022 4:10 PM, n4is@comcast.net wrote: That is a catch 22. The NEC for residence is not the sa
See my comments below. Thanks, 73, Jim W7RY A certified Motorola R56 Inspector. On 12/28/2022 4:10 PM, n4is@comcast.net wrote: That is a catch 22. The NEC for residence is not the same for a Radio St
Whats a catch 22? You need to connect the Amp chassis to the AC neutral (wire connected to the ground at the AC entrance), and you need to connect the Amp chassis to the ground of the station, at sam
On 12/28/2022 2:18 PM, Paul Christensen wrote: Even if there is NOT a neutral, it's created by design fault in some amps and appliances. In the case of the 70/77 series amp, there's no separate neutr
Thanks, 73, Jim W7RY Whats a catch 22? You need to connect the Amp chassis to the AC neutral (wire connected to the ground at the AC entrance), and you need to connect the Amp chassis to the ground o
wonder who's read the list welcome message lately (click amps link at bottom of any of the messages) DO NOT USE THIS REFLECTOR TO POST COMPLAINTS, PERSONAL CRITICISMS OR ATTACKS, AND DISCUSSIONS OF L
Telling someone they are wrong is a personal attack? Can you tell me how that is Bob? Thanks, 73, Jim W7RY DO NOT USE THIS REFLECTOR TO POST COMPLAINTS, PERSONAL CRITICISMS OR ATTACKS, AND DISCUSSION
Oh... And bandwidth limits are SOOOOOO 1990s Bob... Top posting? Just like everyone else does here? Got it. Thanks, 73, Jim W7RY DO NOT USE THIS REFLECTOR TO POST COMPLAINTS, PERSONAL CRITICISMS OR
It is interesting to see the various opinions on Neutral and electrical safety. In Australia we have world best regulation on Electrical standards and I am an A class licenced Electrician. Here we ha