Pass DIY Addict
Joined 2000
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In a pinch for a low pF capacitor? -- twist two insulated wires together -- did this all the time in VHF ham radio gear when you need a couple "puFFFs".
I am an Noob at this but I'm considering this project. I've sorted through this article PassDiy and the BOM included in it makes zero sense to me. Is there a better one out there? I haven't stumbled on one in this otherwise excellent write-up by 6L6 but I breached my attention span at about page 50. Any direction would be greatly appreciated!
And a 101 question. I assume to use this with a Low Voltage MC cartridge I'll have to put a transformer in front of it. Is that correct?
And a 101 question. I assume to use this with a Low Voltage MC cartridge I'll have to put a transformer in front of it. Is that correct?
I use LOMC and don't need a transformer with the gain maxed (R14 at 300 ohms). Here's a BOM, I'm sure some of the items are obsolete but it's a starting point.
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Is there a better bill of material somewhere you developed when you built is. I am seriously lost in that article on Nelson's site.
I have a Feickert table with a Hanna SL MC on it. I also an original owner of a Thorens TD165 with an AT-440 MM. So all the possibilities are there. If the B1Korg/F5 combination I'm working on right now sounds better than my present system, I'll likely put the Feickert on that and will need to modify the Pearl with more gain if you'll help me with that. But I currently have a Whest two.2 pre right not which isn't exactly a shabby piece of equipment either. I just may want to do a complete DIY system just to say I did.
I have a Feickert table with a Hanna SL MC on it. I also an original owner of a Thorens TD165 with an AT-440 MM. So all the possibilities are there. If the B1Korg/F5 combination I'm working on right now sounds better than my present system, I'll likely put the Feickert on that and will need to modify the Pearl with more gain if you'll help me with that. But I currently have a Whest two.2 pre right not which isn't exactly a shabby piece of equipment either. I just may want to do a complete DIY system just to say I did.
In my experience a B1 and F5 aren't a good combo, I couldn't get up to even normal listening level using a CD player. Preamps with gain work well though, I used an O2 headphone amp, a Marantz HT receiver, and finally a BA-3 front-end which is the best so far.
OK, this is a B1 Korg unit. I don't know if that makes a difference. Currently I have the B1Korg pushing a single Amp Camp Amp into my Tekton Ulfberht speakers and you cannot turn it all the way up and stay in the room. That said, the Ulfs are extremely efficient speakers. And the B1K with the ACA sound exceptionally good. Mr. Pass did post in the B1K thread when I asked about the F5 compatibility "F5, generally designed as 3rd harmonic beast, has good prospects as a mate. " so I hope he's correct because that's what sent me down this path. But your experience definitely has me concerned.
So it's right between the B1 and the BA-3 which has 30dB. I'll be interested to hear if it's enough. My speakers are rated at 90dB efficiency and I can fill the room pretty easily.
Mine are rated at over 100dB which I doubted until I hooked the ACA to it. Not doubting it now! The combination will get very loud and also maintain the low end. Didn't really expect that.
The Hana SL has 0.5mV output. Should be no problem with the Pearl 2, get the gain up to 58-60dB by lowering R14 to 750-500 Ohm. It will not be as loud as a cd player, but probably enough to drive your efficient speakers to (more than) the required volume. Just turn the volume knob a bit further.