[Scott Dorsey]

Les Cargill wrote:

It's not about the labor. Seriously, ever punch up the vox
mic and the gtr mic, and listen for phasiness? Hey, you
got vocals in my guitar mic.... no, you got guitar in my vocal
mic

My secret for that is the BK-11...
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Les Cargill[_4_]]

Scott Dorsey wrote:
Les wrote:

It's not about the labor. Seriously, ever punch up the vox
mic and the gtr mic, and listen for phasiness? Hey, you
got vocals in my guitar mic.... no, you got guitar in my vocal
mic

My secret for that is the BK-11...
--scott




I bet so. Those are like... secret alien technology

http://www.coutant.org/bk11/index.html

--
Les Cargill

[Peter Larsen[_3_]]

Scott Dorsey wrote:

Les Cargill wrote:

It's not about the labor. Seriously, ever punch up the vox
mic and the gtr mic, and listen for phasiness? Hey, you
got vocals in my guitar mic.... no, you got guitar in my vocal
mic

My secret for that is the BK-11...

Buy it now: USD 2600 (!) - will a BM5 do? - btw. how should I store it,
vertical or horisontal?

--scott

Kind regards

Peter Larsen

[Les Cargill[_4_]]

Peter Larsen wrote:
Scott Dorsey wrote:

Les wrote:

It's not about the labor. Seriously, ever punch up the vox
mic and the gtr mic, and listen for phasiness? Hey, you
got vocals in my guitar mic.... no, you got guitar in my vocal
mic

My secret for that is the BK-11...

Buy it now: USD 2600 (!) - will a BM5 do? - btw. how should I store it,
vertical or horisontal?


So how are the NADY ribbons? Frys has 'em for $100.

--scott

Kind regards

Peter Larsen




--
Les Cargill

[Scott Dorsey]

Les Cargill wrote:
Peter Larsen wrote:
Scott Dorsey wrote:
Les wrote:
It's not about the labor. Seriously, ever punch up the vox
mic and the gtr mic, and listen for phasiness? Hey, you
got vocals in my guitar mic.... no, you got guitar in my vocal
mic

My secret for that is the BK-11...

Buy it now: USD 2600 (!) - will a BM5 do? - btw. how should I store it,
vertical or horisontal?


So how are the NADY ribbons? Frys has 'em for $100.

None of them have a decent null to them, making them useless for the
application. Still, for under $100 they're probably useful for _something_.

The null on the BK-11 is amazing even by ribbon standards.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Scott Dorsey]

Peter Larsen wrote:
Scott Dorsey wrote:
Les Cargill wrote:

It's not about the labor. Seriously, ever punch up the vox
mic and the gtr mic, and listen for phasiness? Hey, you
got vocals in my guitar mic.... no, you got guitar in my vocal
mic

My secret for that is the BK-11...

Buy it now: USD 2600 (!) - will a BM5 do? - btw. how should I store it,
vertical or horisontal?

That's an insane price. Buy a Beyer M-130 instead, it's easier to place
and the null is just as good.

Null on the BM5 isn't bad but the output is very low.

Store the BK-11 and M-130 both vertically.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Peter Larsen[_3_]]

Scott Dorsey wrote:

Null on the BM5 isn't bad but the output is very low.

I built a booster-amp for it with a Hitachi MC-preamp chip, works fine with
unbalanced input except for a bit of buzz from the upper capsule. Some of
the time I'm a coward, so I have NOT felt any inclination to disassemble the
mic-pair and investigate.

Could be that it is a better idea to build a trannybox, I have a pair of
Sennheiser TM005's that I used to use in reverse as input transformers in my
A77 with input board bypassed, ie. directly to the rec-level pots. I should
have thought of ripping the input transformers from the becords that I had
no room for keeping and not only ripped the heads, but the TM005 is probably
better as a step-up.

Store the BK-11 and M-130 both vertically.

And that pristine BM5 which has just about done nothing - I did use it to
record a voice improvisation in 1985, great sound on vox if not close, great
space just recording in a reasonable listening-room - but sleep in its fine
wooden box for 50 years? - should I not worry or stand the box on its end in
the mic drawer? - mind you, its precious, I paid DKK 250 for it and it is
one of the products Bang & Olufsen seemingly do not want to be reminded of
having produced, no info available from them.

--scott

Kind regards

Peter Larsen

[Scott Dorsey]

Peter Larsen wrote:
Scott Dorsey wrote:

Null on the BM5 isn't bad but the output is very low.

I built a booster-amp for it with a Hitachi MC-preamp chip, works fine with
unbalanced input except for a bit of buzz from the upper capsule. Some of
the time I'm a coward, so I have NOT felt any inclination to disassemble the
mic-pair and investigate.

I would first rewire the mike for balanced output. The transformers are
inherently balanced; the only reason the output is unbalanced is that one
end is tied to ground.

I might also try and replace them with Royer's new designs.

Could be that it is a better idea to build a trannybox, I have a pair of
Sennheiser TM005's that I used to use in reverse as input transformers in my
A77 with input board bypassed, ie. directly to the rec-level pots. I should
have thought of ripping the input transformers from the becords that I had
no room for keeping and not only ripped the heads, but the TM005 is probably
better as a step-up.

You need gain. Stepping up the voltage means stepping down the impedance
and that's not going to make the ribbon happy.

And that pristine BM5 which has just about done nothing - I did use it to
record a voice improvisation in 1985, great sound on vox if not close, great
space just recording in a reasonable listening-room - but sleep in its fine
wooden box for 50 years? - should I not worry or stand the box on its end in
the mic drawer? - mind you, its precious, I paid DKK 250 for it and it is
one of the products Bang & Olufsen seemingly do not want to be reminded of
having produced, no info available from them.

I think they should be held upright so that the ribbons themselves are
vertical at all times.

B&O didn't actually make those, they just rebadged them. I don't recall
the whole story, but David Royer purchased the rights to the original
Speiden design which the B&O was adapted from and the current Royer ribbons
are mechanically very similar designs but with much better transformers
and magnets.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Peter Larsen[_3_]]

Scott Dorsey wrote:

Peter Larsen wrote:
Scott Dorsey wrote:

Null on the BM5 isn't bad but the output is very low.

I built a booster-amp for it with a Hitachi MC-preamp chip, works
fine with unbalanced input except for a bit of buzz from the upper
capsule. Some of the time I'm a coward, so I have NOT felt any
inclination to disassemble the mic-pair and investigate.

I would first rewire the mike for balanced output. The transformers
are inherently balanced; the only reason the output is unbalanced is
that one end is tied to ground.

My level of information is that the mic is balanced out, the preamp is
however not balanced in.

I might also try and replace them with Royer's new designs.

Could be that it is a better idea to build a trannybox, I have a
pair of Sennheiser TM005's that I used to use in reverse as input
transformers in my A77 with input board bypassed, ie. directly to
the rec-level pots. I should have thought of ripping the input
transformers from the becords that I had no room for keeping and not
only ripped the heads, but the TM005 is probably better as a step-up.

You need gain. Stepping up the voltage means stepping down the
impedance and that's not going to make the ribbon happy.

I am thinking 1:2

And that pristine BM5 which has just about done nothing - I did use
it to record a voice improvisation in 1985, great sound on vox if
not close, great space just recording in a reasonable listening-room
- but sleep in its fine wooden box for 50 years? - should I not
worry or stand the box on its end in the mic drawer? - mind you, its
precious, I paid DKK 250 for it and it is one of the products Bang &
Olufsen seemingly do not want to be reminded of having produced, no
info available from them.

I think they should be held upright so that the ribbons themselves are
vertical at all times.

I'll see if that can be implemented without a risk of the box falling over,
that probably would be bad.

B&O didn't actually make those, they just rebadged them. I don't
recall the whole story, but David Royer purchased the rights to the
original Speiden design which the B&O was adapted from and the
current Royer ribbons are mechanically very similar designs but with
much better transformers and magnets.

Ah, very interesting, thanks!

--scott

Kind regards

Peter Larsen

[Scott Dorsey]

Peter Larsen wrote:
Scott Dorsey wrote:

Peter Larsen wrote:
Scott Dorsey wrote:

Null on the BM5 isn't bad but the output is very low.

I built a booster-amp for it with a Hitachi MC-preamp chip, works
fine with unbalanced input except for a bit of buzz from the upper
capsule. Some of the time I'm a coward, so I have NOT felt any
inclination to disassemble the mic-pair and investigate.

I would first rewire the mike for balanced output. The transformers
are inherently balanced; the only reason the output is unbalanced is
that one end is tied to ground.

My level of information is that the mic is balanced out, the preamp is
however not balanced in.

You want balanced in! It is your only salvation especially when
dealing with fairly high-Z inputs!

You need gain. Stepping up the voltage means stepping down the
impedance and that's not going to make the ribbon happy.

I am thinking 1:2

Try just the normal THAT1015 preamp chip instead. Reasonably high-Z
input, lower noise than a 1:2 transformer, inexpensive. Good balancing.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."