To the techies on this list. I am designing a power supply using LTspice and need some numbers. Just had a thought that you might be able to answer a question I have. Do you know about what the vario
You need to first define what the 600 watt rig is. SSB PEP power or an AM rig. What kind of voltage regulation do you need/want. Full wave voltage doubler or full wave bridge, capacitor or choke inpu
Gary: Do you have LTspice? I will plug those numbers into the transformer model to complete the design. The numbers I quoted are adequate for the problem as stated. - Jim Tonne ______________________
Hi Jim, No I don't have LTspice. What I was saying about what type of service the power supply is to expect to see matters a great deal. A transformer (a good one) that is to be used with a voltage d
I guess I dont understand the need to use a program for this. Simply give your operational requirements to any transformer company such as Magcap and Heyboer and let them figure it out. Carl KM1H ___
This is quite informative...Question, From Gary's comment about Secondary Resistance, and choke input power supplies, not sufficient for SSB dynamic regulation, if one has available an older power su
Hi Pat, The biggest problem with a choke input filter is the transient response of the choke with SSB. It will allow the voltage to dip quite a bit on some of the voice peaks as the amplifier demands
of Speaking of tuned-chokes: I've built several power supplies over a many year period using this method. Some worked well, some didn't. I've always used the method that I thought was the only metho
SSB is less critical than a Class AB or B modulator as far as PS requirements which is why a single capacitor is capable of sufficient filtering. For a modulator a choke input is used and it is not a
See my post to Gary. Also check out old Thordason, Kenyon, UTC and other 1930's-50's catalogs available on line for resistance values of fixed and swinging chokes. Carl KM1H _________________________
Filtering isn't the problem. Dynamic regulation is a problem with a choke. You get severe voltage drops when current is drawn at an audio rate from the power supply. A swinging choke is even worse th
I can't comments on the swinging choke, I haven't looked at that. However, I've done quite a bit of modeling of a design I'm planning and find that a tuned choke does not solve the dynamic regulation
That is in complete disagreement with reality. A swinging choke is even worse than a regular choke. They Tell me the difference between a Class B amp and a Class B modulator requirements. I have many
The same problems exist with either. However with a modulator, often it is powered from the same supply as the finals are and there is a heavy static load on the power supply. The percentage of curr
Incorrect. Long established practice often utilizes seperate supplies as the voltages are often different or the total current is too much for a single supply. I suggest that you at least research th
No I said that if you were going to use a choke that it should be a tuned choke. There is no way that you will get good dynamic regulation with a regular choke or a swinging choke in an SSB power su
And you continue to dance to your own drummer and ignore over 70 years of proven application. Static regulation may be fine with a choke but not dynamic That makes absolutely no sense. Models are onl
I would suggest that you might want to read some of the modern stuff on power supplies but if you have no interest and feel it is a waste of time then this discussion is pointless. 73 Gary K4FMX ___
What if . . . one had a choke (swinging, or otherwise) input AND lots of capacitance? 73, Barrie, W7ALW _______________________________________________ Amps mailing list Amps@contesting.com http://li
It became pointless when you started insisting that a swinging choke was useless for SSB. I suggest that you quit while you arent too far off in the woods yet. My comments were based upon solid engin