JerryPbury
Well-known member
Which one is closest to original as far as sound? I will be using a Moby BV08 transformer. Capsule recommendations? Anybody who has built either one or both care to comment?
Thank you!
Thank you!
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The closest seems to be the D-47 but kinda difficult to find good matched 408 tubes.Which one is closest to original as far as sound? I will be using a Moby BV08 transformer. Capsule recommendations? Anybody who has built either one or both care to comment?
Thank you!
3u m7 is great but a little flatter than Neumann…not quite the low mid warmth. Of course the best choice is a Neumann k47 if you can find one. I have had good results with heiserman hk47 ( a little more 10k and less mid bump than Neumann) but very big, smooth and balanced capsule.Went with the D-47, need to order the output transformer from Moby (request in). And find some tubes. I have most of the parts for mic and PS as I’m a pack rat DIYer and have always bought way more than I need! Not sure who’s capsule I’ll use. I have a 3U M7 and several high end Chinese K47’s to test before I buy a better capsule. Recommendations? I am currently running these capsules in a batch of G7’s that I built last year and they all sound very good.
True, heiserman is a hybrid but “more 47” than most replicas. The big plus is it sounds effortless and “uncongested” in the mids.I have Heiserman 67 capsules in a couple of DIY U67s with Moby transformers and they are great but I thought I read somewhere that his 47 wasn’t a true 47 but was a hybrid of a 47 & 67. Is this correct or? Was thinking of Beesneez for a change as getting capsules from Heiserman and Tim Campbell anymore is darn near impossible. I feel lucky that I have 3 of Tim’s capsules. Considering Thiersch, pricing isn’t bad. Mylar or PVC? Nice to have choices.
I prefered the blue. I bought one of each and compared them. I even preferred the Maiku to the red. But this is just a single example of each and it depends on taste with high quality capsules. I have never compared to a 'real' u47 so have no idea on a 'closest to original'.Considering Thiersch, pricing isn’t bad. Mylar or PVC?
I went with the Beesneez K7…..I can recommend the Beesneez K7 as a good K47 capsule. I think it sounds every bit as good as a Thiersch Red in an EF800 circuit.
408A tubes don't need to be matched on D47 or MK-47 which are the same design.The closest seems to be the D-47 but kinda difficult to find good matched 408 tubes.
The ef800 work better with m7 capsules to my ears but it lacks the depth and response of a vf14.
My most successful 47 clones are point to point with nuvistors and either 12ohm cathode resistor and bv08 or standard biasing for nuvistor as per the Neumann u47n schematic and bv11 10:1 transformer.
The psu is slightly different for nuvistor too but you could actually separate heater and b+ to avoid excessive heat in the mic from the drop resistor.
The p2p is very easy with nuvistor since you can fit everything on a single phenolic piece with turret pins
Oh thanks, I was under the impression they had to. Thanks again for correcting408A tubes don't need to be matched on D47 or MK-47 which are the same design.
What did you use for a nuvistor socket? Source? Thinking of doing this in a later U47 build.The closest seems to be the D-47 but kinda difficult to find good matched 408 tubes.
The ef800 work better with m7 capsules to my ears but it lacks the depth and response of a vf14.
My most successful 47 clones are point to point with nuvistors and either 12ohm cathode resistor and bv08 or standard biasing for nuvistor as per the Neumann u47n schematic and bv11 10:1 transformer.
The psu is slightly different for nuvistor too but you could actually separate heater and b+ to avoid excessive heat in the mic from the drop resistor.
The p2p is very easy with nuvistor since you can fit everything on a single phenolic piece with turret pins
Got them on eBay. Just make sure they have the extended pins on the frame for mounting. If I have time tomorrow I’ll take a pic and add it on this post.What did you use for a nuvistor socket? Source? Thinking of doing this in a later U47 build.
Here are the ones I use.What did you use for a nuvistor socket? Source? Thinking of doing this in a later U47 build.
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