? Put "equalizer" resistors/capacitors on a string of same-type Si rectifiers and one increases the chance of failure. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. en
? Because diodes ordinarily have differing Peak Inverse Voltages, if the equalizer resistors try to force the same V across each diode, the lowest PIV diode can be subjected to more PIV than it can
True enough. except UHF ? It can't, Eric. Good logic, methinks. However, with half-wave rectification, only the forward transient is stored in the filter capacitor, so shunt capacitors across the di
? For full-wave rectifier, choke-filter supplies, and all half-wave rectifier supplies, yes. Capacitor-filter supplies and resonant-choke/C filter supplies have built-in spike suppression, so a MOV
? Only with no load on the transformer. "Why"? - - With a full-wave rectifier and filter C there is a low-ESR load - as he explained. ? Only if the filter-C is removed. ? Ian -- Do those whom you ca
The waveshapes on the primary and the secondary a transformer are virtually identical. Suppress transients on one, and the job is done. cheers, Paul - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG
? A resonant-choke filter should be ok with a 106-ohm secondary - and it would reduce the V to something that could be used with an 8877 on SSB. However, a 30A/120V service outlet would be needed. -
K., of on Incoming spikes get rectified and stored in the filter-C. ? no - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end
? 106-ohms is decent for some finite load R, depending on the rectification circuit used. - For FWD service, using a C-filter, multiply the secondary R by a constant of c. 300 to arrive at the usuab
1. remove CB filter. 2. add 10m contacts to bandswitches with #0-80 nuts/screws. 3. rework all tuned input circuits for a Q of 2 -3, and add a 10m tuned input. 4. add 10m tap on tank L. On 10m, ther
? not much but to prevent Cu O from forming, polish the tubing with fine steel wool and coat with gloss urethane varnish. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures.
The padding C is for 80m-loading. The tune C on my SB221 was identical to that in my SB-220. Putting a SB-221 on 27MHz involves wiring around the CB filter; moving the 15m tap on the tank L; and ins
There are Hams who build fashion-amplifiers to impress their friends. cheers, Peter - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end
Fair Radio Sales is reportedly out of these relays. Another source is http://www.mgs4u.com/relay.htm The price is $32.50. In the speedup circuit shown in Figure 7 on my Web site, either the Jennings
Discussing antennas on Towertalk is difficult because of censorship from the moderator. cheers, Cleeve - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end