jgazal Posted March 17, 2014 Report Posted March 17, 2014 Different output power: PS-800 has 35 Watts while PS-900 has 60 Watts.
spritzer Posted March 18, 2014 Report Posted March 18, 2014 (edited) Is there much difference between working with one of those and the standard Hakko? Yes and it is not subtle. One cool thing, when you solder LED's they light up... The difference in power is not something I've ever noticed, even with them side by side. Edited March 18, 2014 by spritzer
jgazal Posted March 18, 2014 Report Posted March 18, 2014 Since we are in this subject, I have read that Weller WTCPT also works with a coil magnet and the curie point of the tip ("Magnastat" vs. "Smartheat"). WTCPT housing is polycarbonate plastic and 45 Watts of output power. Is there anything else that makes Metcal/Oki superior?
spritzer Posted March 18, 2014 Report Posted March 18, 2014 Never tried that Weller so I can't comment on that.
jgazal Posted March 19, 2014 Report Posted March 19, 2014 (edited) I have just bought the Weller WTCPT, which is the only one readily available in my country, and I am already regretful. According to Weller tech sheet that comes with the solder station: “When the soldering tip is cold, a ferromagnetic temperature sensor attached to the tip attracts a permanent magnet. The magnet movement causes a shorting bar to make contact with a set of isolated magnetic contacts thereby supplying power to the heating element through the solder lugs. When the tip reaches its idle temperature, the sensor becomes non-magnetic and no longer attracts the magnet. Then a magnetic bushing attracts the magnet causing the shorting bar to break the circuit. In this manner, power to the heating elements is turned on and off automatically.” It is like an on/off switch. That means discrete inputs of constant power. Metcal instead send RF to the coil which is inside the tip and the coil loose resistance when the tip achieves the curie point, reducing the power transfer. So Metcal power transfer seems to be almost continuous and faster than the physical decoupling in Weller. I will try to get a refund and go to the pain of importing the Metcal... Edited March 19, 2014 by jgazal
spritzer Posted March 19, 2014 Report Posted March 19, 2014 Metcal has something similar in the newer stations, sort of a stand-by feature when the wand sits in the stand. I simply removed the magnets so it doesn't do that any more.
justin Posted March 20, 2014 Report Posted March 20, 2014 (edited) ive used a weller WTCPT for years and just bought a 3rd one. the local electronics company uses them as well which is probably where i got the idea. they've worked well for everything i've done. before that i had everyone's My First Soldering Iron, the Weller WLC100 Edited March 20, 2014 by justin
justin Posted March 20, 2014 Report Posted March 20, 2014 What was so special about these black gate caps? All I remember is mikhail salivating over them. only objective test i've ever seen on them was a THD comparison when using electrolytic caps on the output of a speaker amp into an 8 ohm load, so a lot of power. The Black Gates had lower THD at low frequencies as you got near the corner frequency of the cap/resistor filter that is formed. However you could get the same result by using a larger capacitance cheap electrolytic. and since Black Gates tend to be much larger than cheap electrolytics for the same capacitance, the larger capacitance cap might not use any more space
jgazal Posted March 20, 2014 Report Posted March 20, 2014 ive used a weller WTCPT for years and just bought a 3rd one. the local electronics company uses them as well which is probably where i got the idea. they've worked well for everything i've done. before that i had everyone's My First Soldering Iron, the Weller WLC100 Thank you very much for the input. So I think I will give it a chance.
Pars Posted March 21, 2014 Report Posted March 21, 2014 What was so special about these black gate caps? All I remember is mikhail salivating over them. Probably was salivating at what he could do to his customers wallets by mentioning them
mypasswordis Posted June 27, 2014 Report Posted June 27, 2014 After doing some further planning I think I can get away with using 4170G washers but anyone know a good source for 4171G? No one seems to have any in stock.
GeorgeP Posted June 28, 2014 Report Posted June 28, 2014 (edited) After doing some further planning I think I can get away with using 4170G washers but anyone know a good source for 4171G? No one seems to have any in stock. How many do you need? I may have a few I can spare if you can't wait for stock. Edited June 28, 2014 by GeorgeP
mypasswordis Posted June 28, 2014 Report Posted June 28, 2014 Thanks Marc and George! I'm going to need around 70 for my SS T2 (T2SS?) build so probably a lot more than you can spare, but thanks anyway for offering. Dock date for Future says 9/25 which is in 3 months but I'm going to be pretty busy until then anyway and I need a bit more time to plan out the build.
GeorgeP Posted June 29, 2014 Report Posted June 29, 2014 Yeah, 70 is a few more than I have as spares. Were you going to do it fully SS at the board level, or use SS socket plug-ins like JoeMat did so you can opt for either tubes or SS?
mypasswordis Posted June 29, 2014 Report Posted June 29, 2014 I'm doing fully SS, which is going to make things simpler. No heaters, smaller umbilicals/less wiring, less casework, the output EL34s will be replaced by the Cree 1.7kV unit spritzer posted, and the output CCSes will also use modern sand and be less complicated. There are further simplications like replacing the 2SC3381 current mirrors in the servo with MPSA42 but I bought 2SC3381s anyway and unless they test as counterfeit I will use them. Things are still in the planning stage so there might be more changes than these.
luvdunhill Posted July 7, 2014 Report Posted July 7, 2014 Anyone know where I can find Airpax/Sensata 6600 series temperature switches in SMD?
muskyhuntr Posted July 8, 2014 Report Posted July 8, 2014 This item is normally stocked at Walmart in the (of all places) the electronics department. Beware though, that this is a best seller and quickly sells out. Best to shop early on a Thursday morning after the shelves are freshly stocked! Me
luvdunhill Posted July 8, 2014 Report Posted July 8, 2014 I have checked those places. I was more interested in if Boots or Watsons carried them...
deepak Posted July 9, 2014 Report Posted July 9, 2014 Nickel for big S/E output transformers a bad idea (probably 50%)? I really like Slagle's autoformer, but Electra-Print's website points to it being a poor idea for SET output. Also any reading material about transformers will be welcome. The number of core options is head spinning. From what I have gathered so far M6 M19 grain oriented silicon steel mu-metal amorphous nickel cobalt nanocrystalline (finemet)
johnwmclean Posted July 10, 2014 Report Posted July 10, 2014 (edited) Anyone had experience with this mob for custom transformers? http://www.tortran.com/custom_audio_transformers.html Edited July 10, 2014 by johnwmclean
DefQon Posted July 10, 2014 Report Posted July 10, 2014 (edited) I had a few studio/broadcast PA amp's gutted with Tortran 300-500va toroids, re-used them in a few integrated amp repairs. No problems. Average stuff is average. Are Sumr units still humming away? Edited July 10, 2014 by DefQon
dsavitsk Posted July 10, 2014 Report Posted July 10, 2014 Nickel for big S/E output transformers a bad idea (probably 50%)? I really like Slagle's autoformer, but Electra-Print's website points to it being a poor idea for SET output. Also any reading material about transformers will be welcome. The number of core options is head spinning. From what I have gathered so far M6 M19 grain oriented silicon steel mu-metal amorphous nickel cobalt nanocrystalline (finemet) Ask 5 transformer winders and you'll get 10 answers. Short answer is nickel (which is the same as mu-metal) will saturate quickly with DC requiring a larger core. The increased core undoes nearly all, or possibly more than all, of the benefit. Some people still like it, but you'll get less bass and less power for the same size. And it costs a fortune. There are likely better ways to spend your money. But if you really want to spend it on big cores, check out Lundahl. For push pull it can work better. And push pull sounds better anyway. Slagle has experimented with adding a winding for filaments that is in the opposite direction as the main winding allowing currents to cancel. No idea how successful he's been. For small signal stuff with no DC, nickel or amorphous or whatever is better that steel hands down. Where the dividing line is between small signal and large is the question. Anyone had experience with this mob for custom transformers? http://www.tortran.com/custom_audio_transformers.html Interesting. Less than an hour from me. Might be worth a trip down one of these days. 1
johnwmclean Posted July 10, 2014 Report Posted July 10, 2014 I had a few studio/broadcast PA amp's gutted with Tortran 300-500va toroids, re-used them in a few integrated amp repairs. No problems. Average stuff is average. Are Sumr units still humming away? 36 month warranty ain’t too shabby for an “average” transformer? Sumrs have there moments, I can’t say I’ve had a unit go south yet.
spritzer Posted July 10, 2014 Report Posted July 10, 2014 I've had two SumR self destruct and it ain't pretty. Speaking of transformers, seems Keen Ocean didn't quite get my requirements. The one in the middle should be about the same size as the ones on the left... KGST transformer on the far right, each weighs a whopping 3.3KG...
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