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I came across this tweed princeton a couple of days ago. it had more than few issues with the pots, electrolytic caps, wires, grounding, input jacks and one of the resistors.
and it sounds beautiful like a win instrument with the new components.
haven’t checked the serial nubmber. it just looks came from between 1964 to 1965. someone added an extra diode on the original one. but the original diode works fine without it. more than one component have replaced at some point.
the output level is too low and I guess it’s the filiter caps. it has 20+20+20+20uf 450v multi cap.
they were on ebay and the price was not bad. it was pretty good actually. these .02uf 600v 50’s Astron Blue point capacitors are for my original and project 5F1 champ amps. two of them for the 5F1 project. and the rest of them for the original ’59 5F1 champ in a case I need to replace them like 50 years from now.
Yokomo 870C aka.1988 YZ10 build with
White winter arms
2mm fine pitch drive train
Yokomo Hotlaps wheels
Lightened diff cups
Composite Craft shock towers
Front aluminum bulkhead
AE steel turnbuckles from RC10 Worlds re-release kit
SRS steering blocks
Hotdog4 built with
AE 870C shock towers
MX4 rear aluminum CVD bones
Academy molded wing
Extended wheelbase with longer rear belt
White Kydex bumper, homemade
870C shocks with later shock ends for Works arms
AE steel turnbuckles from RC10 Worlds re-release
Hodog4 has the copper springs now
And, few more pics with C4 body
I’ve been using this 239 bulb after the factory GE #47 bulb went dead. 239 is same 6.3V and the bayonet base is identical to #47. mine came from Westinghouse as I remember. and found more from Tung-sol, Sylvania, Chicago Miniature, and more
239 rated 2.268 watt while 47 is 0.945 watt according to this web page. I’m wondering if I can go with this bulb. but didn’t have an issue yet
Came across this big red bum fuzz here on reverb.com
Sola Sound / Macaris sells a few different versions with different components along with the pricing. this one is a literally cheap, actually the cheapest version of them. they had/have more coming as well.
They have 3 different versions by the price. £399.00, £349.00, and £149.00. then I paid $29 for international shipping. mine is £149.00. it was $195 shipped to South Korea.
£399.00 and £349.00 versions come with the reliable components like Cliff jacks, Carling(could be Arrow H&H) DPDT footswitch, Omeg potentiometers (2 of log B 100K, 1 of linear A 100K), and better caps and resistors.
They put Zetex ZTX109 transistors on £399.00 version with better caps, even with the NOS carbon composite resistors, and probably with some tweaks.
£349.00 Bum Fuzz Unit comes with BC184 transistors. £149.00 version comes with the same transistors as far as I know. (update – this pedal came with BC549C known as a substitute for BC184)
But, £149.00 version has, as the name, cheap components include the plastic molded pots. the pots feel not good. but they still came from Piher at least. it has more unknown parts like 1/4″ jacks, footswitch, knobs, and ceramic caps.
I believe I can change some of the parts using the pics on Macaris.co.uk and Reverb.com. The schematics for Jumbo Tone Bender and B&M fuzz are on the web.
I’ll update with some mods and samples. here are the pictures
did a simple job for a friend. he has some extra 50’s Jensen speakers and wanted to use them with this GT40 amp.
he told me GT40 has mono and stereo output mode. so, we decided to leave one of the 6.5″ speakers as it was. then put a long thread 1/4 jack on the other output.
the only place I found for the internal/external switch was the inside of the bass reflex vent on the back. the back panel itself is too thick to attach the switch.
didn’t expect any noticeable difference between them. but there are actually. Sennheiser 1/8″ to 1/4″ phone plug adapter sounds way better
(Picture by Alexander Gerst from the ISS)
We take good old O2 for granted. People are always going on about how early Earth was “perfect” for life. A perfect hell maybe. No ozone layer, no oxygen, extreme heat, an abundance of highly corrosive chemicals in the atmosphere including sulfur and methane.
Much like found on Titan the largest of the moons of Jupiter today. It was a literal red sky hell. With all of that methane and sulfur, it must have smelled like a frat house on chili and hard boiled egg night. So, the Earth was devoid of oxygen in the beginning but as I said there was a metric butt-load of methane and sulfur in the oceans.
So, little single-celled organisms developed that lived on methane and sulfur. After a while, the sulfur level dropped and the methane level did as well. No one is sure why. There still was little oxygen. So some more little critters evolved which produced oxygen called “cyanobacteria”.
It took a billion years for these critters to terraform our planet for the evolution of animals and more complex plants. To this day all plants incorporate these ancient cyanobacteria into their cells in structures known as a “cyanoplasts”. You see life itself changed the planet to support life.
This is what life does.
More informations to this topic: https://en.wikipedia.org/wiki/Great_Oxygenation_Event
all the 5F1 champ around me have Oxford 8EV speakers and they seemed to have Jensen P8T as well. found one from CTS which sounds like the stock Oxford. they are 4 ohm impedance and DCR is mostly 3.2 ohm
I’m not sure with new and doped speakers but old, broken in and sometimes brittle speakers sound way better with edge doping in every aspect to me. it’s like a having a good preamp tube in vintage tweed amps
it’s an Oxford from ’59 Champ along with one from 62’s. the cone went yellow and I guess it was in a place with carbon monoxide gas around. both has doped in the end
and 60’s Ceramic speaker from Oxford. and another one from CTS. this CTS is not Fender stock but sounds pretty much like the stock speakers.