[mdelrossi]

I was listening to the Bugle the 9v's decided to konk out so lets whip up sumthin'.
I have a few 6v sla's (I use them for flashes) and a car battery booster and a need to listen to music.
Well after I cobbled them together, plugged it in and turned it on…Wow!
the standard Bugle with 9v sound similar to my Soundvalves vtp-101 phono stage but with the 12v sla's…
Where did that soundstage come from ?? Dynamics, and resolution. Ok it's missing a bit of the tube sound (not much), but I haven't started to try any other opamps yet!!.
So my question to y'all is is it worth it to change out all the caps and if so which brand?
I'm ordering a few 2227's and 2604's anything else I should try before I order the Cornet2???? aa


Thanks
mdr

[doorman]

The Bugle is a good phono stage. Your SLA approach is intriguing, the wheels are turning  Think I'll give it a try!
                                                                                    Don

[PatOMalley]

http://www.bursonaudio.com/Burson_HDAM_Module.htm

you could goto opa627 or AD857 or Burson discrete opamp. My Burson is in the mail.
Supposedly the Burson has the most detail and presence over the top opamps. I will see.

I like the 227 a bit more than the 2604 but the change between the two in this application is not vast. I am hoping that the Burson opamp is. The 227 has verve than the 2604. Detail might be the same between the two.

The Burson is about $100.

For half the price you might try a setup from Reference Audio Mods: http://www.referenceaudiomods.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=RAM&Category_Code=OPAMPS

[amandarae]

LM4562....but I highly recommend the Cornet2 

 FWIW, why not build the Bugle Power Supply then put the two (Bugle and PSU) in a good size case.  In that sense, its a complete, portable phono stage with a dedicated PSU unit.  Then wait for the Piccolo head amp and have it build with its own case.  With these combo, you can have virtually any cartridge you want to throw at it for evaluation.  Hmmmmm....that makes sense!  Let me check that Ebay listing for the Bugle kit..........

[mdelrossi]

What and hide all of those lovely wires????
Actually I'm going low budget on this I've got the batteries already.
The LM4562 is it a drop-in replacement or does it need a browndog adapter?
Also should I replace all of the op-amps or just #3?
thanks.
mdr

[hagtech]

Is that insulator under the BUGLE calibrated?

jh

[amandarae]

Is that insulator under the BUGLE calibrated?

jh

I believe that is Myrtle Wood Jim!

[amandarae]

What and hide all of those lovely wires????
Actually I'm going low budget on this I've got the batteries already.
The LM4562 is it a drop-in replacement or does it need a browndog adapter?
Also should I replace all of the op-amps or just #3?
thanks.
mdr

Yes, I was told!  Here are the specs of the two and the LM 4562 comes in DIP (or TO if you prefer) package as well.  Note the "red underlined" entries.  I use them in exchange for the OPA 2134 in my Linkwitz Orion ASP.

LM4562
Power Supply Voltage Range ±2.5V to ±17V
THD+N (AV = 1, VOUT = 3VRMS, fIN = 1kHz)  
RL = 2k 0.00003% (typ)
RL = 600 0.00003% (typ)
Input Noise Density 2.7nV/SqrtHz# (typ)
Slew Rate ±20V/µs (typ)
Gain Bandwidth Product 55MHz  (typ))
Open Loop Gain (RL = 600) 140dB (typ)
Input Bias Current 10nA (typ)
Input Offset Voltage 0.1mV (typ)
DC Gain Linearity Error 0.000009%

General Description


--------------------------------------------------------------------------------
The LM4562 is part of the ultra-low distortion, low noise, high slew rate operational amplifier series optimized and fully specified for high performance, high fidelity applications. More...

OPA2134  
Available Channels S,D,Q      
CMRR(Min)(dB)    86      
GBW(Typ)(MHz)  8      
IIB(Max)(pA)    100  
Iq per channel(Max)(mA)  5  
Number of Channels    4  
Offset Drift(Typ)(uV/C)   2  
Open Loop Gain(Min)(dB)   104  
Shutdown No      
Slew Rate(Typ)(V/us)   20  
Spec'd at Vs(V)    +/-15  
VIO (25 deg C)(Max)(mV)   2  
VIO (Full Range)(Max)(mV)  2.01  
Vn at 1kHz(Typ)(nV/rtHz)    8  
Vs(Min)(V)   5  
Vs(Max)(V)  36  
Operating Temp Range(Celsius) -40 to 85        
Pin/Package 8PDIP,8SOIC   8PDIP,8SOIC    

[mdelrossi]

Cork to dampen vibrations aa
Hey Jim Thanks for the kit it was fun to put together even got my 12 year old daughter to solder some. Now she wants to build a headphone amp hint hint
mdr