Has anyone tried this?
http://www.hagtech.com/bugle.html
I'm curious about it. Sounds intriguing.
Sterophile/Fremer review on site:
"Because the Bugle uses a split, passive RC-type equalization network, it's easy to optimize it for alternative EQ curves suach as pre-1955 LPs or 78s. Hagerman calls this AnyEQ; you'll find everything you'll need to calculate resistor values for various curves at http://www.hagtech.com/equalization.html. "
I'm still interested in the BBE rewire as proposed by MarkRob:
https://lathetrolls.com/viewtopic.php?t=2564&mforum=lathetrolls
(This thread can get moved into "Playback" eventually.)
Hagerman (Hagtech) Bugle phono preamp?
Moderators: piaptk, tragwag, Steve E., Aussie0zborn
Hi Steve,
Seems nice. It is a bit easier to setup for different turnovers, but you will still need to switch parts to change curves. Just makes the calculation for the values easier. Not sure I like the battery supply, but you could easily add your own external supply.
A flat gain stage with the EQ in software is by far the easiest and most flexible, but the analog op-amp based approach is probably better sounding if you are the audiophile type.
Mark
Seems nice. It is a bit easier to setup for different turnovers, but you will still need to switch parts to change curves. Just makes the calculation for the values easier. Not sure I like the battery supply, but you could easily add your own external supply.
A flat gain stage with the EQ in software is by far the easiest and most flexible, but the analog op-amp based approach is probably better sounding if you are the audiophile type.
Mark
I still blame Hagerman for the whole "4th pole debacle". This is the idea, based on heresay, that the roll off in cutting systems somewhere above 50kHz needs to be compensated for in playback preamps. Hagerman attributes it to a guy named Allen Wright, who said it is in some Neumann manual, somewhere. Not any that I have! Who would design a preamp based on heresay??? Soon all the new "audiophile" preamps had it.
All disk cutting systems are rolled off somewhere over 50kHz. This is to keep the amps stable and prevent them from picking up things like AM radio. There is no standard for the frequency or number of poles (often 3). Mine doesn't start to roll off until 100kHz. Arbitrarily putting in a 4th pole at 50kHz creates more errors than it fixes.
I notice this new one doesn't have it so I guess he got the message. (But you can still find the other one on his site.)
All disk cutting systems are rolled off somewhere over 50kHz. This is to keep the amps stable and prevent them from picking up things like AM radio. There is no standard for the frequency or number of poles (often 3). Mine doesn't start to roll off until 100kHz. Arbitrarily putting in a 4th pole at 50kHz creates more errors than it fixes.
I notice this new one doesn't have it so I guess he got the message. (But you can still find the other one on his site.)
Kevin Gray
Reminds me of a story an old Bell Telephone guy once told me. Seems in the 1950's Radio Luxemborg installed a new, high-power AM transmitter - and people in town started calling in complaining about picking up the station - on their toasters! The "Luxemborg effect" as it was called in those days was due to dirty or semi-corroded electrical and other metal-to-meal connections in household appliances, that acted like diodes when impinged upon by radio waves. The sides of the toasters turned into resonant pickups.cohearent wrote: All disk cutting systems are rolled off somewhere over 50kHz. This is to keep the amps stable and prevent them from picking up things like AM radio.