Hi, My n-name is Telefunky and I'm from Hampshire, UK. I'm new to this forum so if I've posted this in the wrong place I'm sorry.
I would like some help. Some years ago I had a 1970s Rotel Transistor Amp, I think it was a RA???(insert number) any hoo I had the power supply capacitors upgraded and it was re-wired with shielded OFC Braided cable by an amateur HI_FI enthusiast. It sounded great after this inexpensive upgrade but alas has long since gone to transistor heaven.
So my question, do I copy the values of the o.e when replacing the psu caps? Do I use the best quality I can afford? Is it best to do this to a simple transistor amp with no built in tuner or does it not matter. ( I guess it does 'cos a modest Tuner/Amp will have hundreds of cheap and nasty components for the sake of the many erroneous functions needed for the product to appear to be "Good Value"
My old Rotel had a source selector, Volume, Bass, Treble, Loudness, and a Power Switch. It responded very well to the upgrades and the dynamics of the frequency range were cleanly defined in the same way real life ambient sounds are.
Some music was out of this world, Zappa studio albums like "Apostrophe" and "Joes Garage with properly tuned drums, toms and snare, delighted the listener with what sounded like an impossibly slow widened square wave turned thru 90 degrees. Panning with good/speakers x-over coils was 10 times better after the mods.
Yes I know I should get some valve bi-amps but trannies can sound o.k for most use.
I pay Homage to the technicians on this site, for your task is a noble one,'cos u create audio illusions for the human ear. Even a high-hat sounds great "tisch-tish-tit-tit-tit" thru good Hi-Fi
I buit my speakers with the help of my friends testing facilities , nothing too silly, in fact as cheap as I thought I could get away with.
A)s Vistation Ribbon Tweeters,
Morel MW142 75mm aluminium Hexatech v-coil Woofers, 35mm bass port tube, Visation film cap&graphite coil x-overs tuned to computers analysis after initial build, wired with OFC silicon cable in computer designed 35 liter cabinets that I built from 1" Oak laminated SMDF with full mitred joints and flush fitted units.
B)s Visaton G20 FFL Tweeters, Visaton W100S midrange, Morel MW142 Woofer, X-Over tuned as before and fitted into 55Litre Cabinets sprayed with auto paint black, this time Midrange at the top , tweeter in the middle etc. 2X 20mmby60mm Port Vents either side of the tweeter.
The A set look like something from the 70s and the B set, late 80s just after the ghastly plastic fake wood look faded out and the "shows up dents and dirt" black was popular. Still, they sound great at modest volume levels.