00:00:00.060 what kind of caps do you prefer this 00:00:05.84000:00:05.850 comes from Kenneth and Maryland and 00:00:07.49000:00:07.500 Kenneth writes Paul I'm building a j TM 00:00:11.57000:00:11.580 45 point to point to that okay sorry I 00:00:18.38000:00:18.390 have no clue what that is and and want 00:00:20.87000:00:20.880 to know what capacitor construction type 00:00:22.67000:00:22.680 you prefer in the audio circuit Mallory 00:00:25.49000:00:25.500 type polyester metallized polypropylene 00:00:27.74000:00:27.750 or a mix for coupling well as we know in 00:00:31.82000:00:31.830 a vacuum tube circuit you're going to 00:00:33.97900:00:33.989 need coupling caps really it's really 00:00:36.88900:00:36.899 tough to do any kind of direct coupling 00:00:38.81000:00:38.820 with vacuum tube circuits possible but 00:00:41.63000:00:41.640 really tough so let's just assume that 00:00:43.45900:00:43.469 you're going to do that for coupling 00:00:45.83000:00:45.840 capacitors my all-time favorite is film 00:00:48.77000:00:48.780 and foil well cap makes them who else 00:00:52.88000:00:52.890 make a number of companies Jansen my 00:00:56.51000:00:56.520 favorite RL caps but there are boot boy 00:00:59.95900:00:59.969 there are some really beautiful 00:01:01.77900:01:01.789 capacitors out there I mean Jupiter 00:01:04.72900:01:04.739 Darrin Meyer our engineer just came in 00:01:07.91000:01:07.920 he's been working on this really cool 00:01:09.83000:01:09.840 vacuum tube input for one of the stellar 00:01:12.98000:01:12.990 series amplifiers and it has these giant 00:01:15.37000:01:15.380 we can't use them in production I mean 00:01:17.66000:01:17.670 there are a hundred and fifty dollars 00:01:19.03900:01:19.049 apiece oh my god but they're you know 00:01:21.85900:01:21.869 beeswax ends film and foil I mean 00:01:24.67900:01:24.689 they're just like the I want to say the 00:01:26.89900:01:26.909 bee's knees because they're beeswax so 00:01:29.35900:01:29.369 maybe they are the bee's knees but in 00:01:31.39900:01:31.409 any case they're they're just gorgeous 00:01:34.46000:01:34.470 but film and foil now let's talk about 00:01:37.76000:01:37.770 what is it what does that mean so in a 00:01:40.37000:01:40.380 number of film capacitors and and and 00:01:42.44000:01:42.450 unless be clear we're talking about film 00:01:45.13900:01:45.149 capacitors not electrolytic s-- in the 00:01:47.71900:01:47.729 signal path stay away from electrolytic 00:01:50.09000:01:50.100 sivan if they're just bipolar 00:01:51.35000:01:51.360 electronics don't don't go there so it's 00:01:54.74000:01:54.750 all film we're talking about now there 00:01:56.87000:01:56.880 are different kinds of film in the 00:01:58.96900:01:58.979 insulating material there's teflon film 00:02:00.92000:02:00.930 there's polyester that's polystyrene and 00:02:04.10000:02:04.110 then most of those are what we call 00:02:07.19000:02:07.200 metallized films so what they do is they 00:02:10.82000:02:10.830 take that plastic film which is the 00:02:12.89000:02:12.900 insulator 00:02:13.96000:02:13.970 and they plate on metals it could be any 00:02:18.82000:02:18.830 any kind of metal tin you know aluminum 00:02:22.65000:02:22.660 and and then they they wind those around 00:02:27.07000:02:27.080 and hook you know one lead of the 00:02:29.41000:02:29.420 capacitor on one end of the coil of the 00:02:31.75000:02:31.760 wind and the other on the head and then 00:02:34.30000:02:34.310 put a fancy little pocket over it you 00:02:36.19000:02:36.200 got a cap right because it's insulator 00:02:38.49000:02:38.500 conductor insulator conductor a better 00:02:42.07000:02:42.080 sounding way to build a capacitor is 00:02:45.64000:02:45.650 instead of metal izing by electroplating 00:02:48.64000:02:48.650 the can the conductive material onto the 00:02:54.61000:02:54.620 film you have separate film and foil so 00:02:59.62000:02:59.630 there's whatever the film is poly 00:03:01.90000:03:01.910 polypropylene whatever the film is that 00:03:05.56000:03:05.570 you're going to use then there is a 00:03:07.60000:03:07.610 layer of tin foil so it sits and they're 00:03:10.42000:03:10.430 actually wound together those are by far 00:03:13.42000:03:13.430 the best sounding capacitors I've ever 00:03:16.45000:03:16.460 heard and I guess a rail cap makes them 00:03:19.54000:03:19.550 I mean if you can afford it teflon and 00:03:22.57000:03:22.580 film or foil 00:03:24.88000:03:24.890 oh good sounding stuff but that'll 00:03:27.13000:03:27.140 that'll cost you that'll be a pretty 00:03:29.68000:03:29.690 penny so those are my favorite kinds of 00:03:32.47000:03:32.480 capacitors for coupling in any kind of 00:03:38.92000:03:38.930 audio circuitry it's what we use in our 00:03:41.50000:03:41.510 so like our stellar phono stage rail cap 00:03:45.58000:03:45.590 film and foil you betcha 00:03:48.46000:03:48.470 okay thanks talk to you later see you 00:03:52.09000:03:52.100 tomorrow 00:03:55.96000:03:55.970 [Music] 00:03:59.67000:03:59.680 [Laughter] 00:04:01.54000:04:01.55000:04:05.12000:04:05.130 you 00:04:07.55000:04:07.56000:04:10.01000:04:10.020
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