Little Amp into 8ohm ~= Herzog ?

[petemoore]

  Anyone try this while driving an 8 ohm speaker [output at speaker tapped to amp input...what happened ?
  Anyone try this with an 8ohm speaker coil, minus the magnet? [Using the speaker coil for an 8ohm load...
  Basic Champ type amp, huge 8 ohm fixed resistor [20watt]...from the google searches and reads, seems to be ~what the H-Zog actually is.

[Tubebass]

A local player had his Epi Valve Jr. set up that way. Worked great.This was using an 8 ohm resistor. I think you'll find that a speaker voice coil without the rest of the speaker is no load at all.
My son wants to try using  a small p-p amp in a Herzog-like way.... if he ever gets around to it, I'll report back.

[petemoore]

A local player had his Epi Valve Jr. set up that way. Worked great.This was using an 8 ohm resistor.
  I should be able to come across an 8 ohm 'brick' today.
  I think you'll find that a speaker voice coil without the rest of the speaker is no load at all. 
  You anticipated the well drafted question, and answered it [I was kinda wondering about this].
  Perhaps I can just muck-glue to fix a coil & magnet ?
My son wants to try using  a small p-p amp in a Herzog-like way.... if he ever gets around to it, I'll report back.
  Your son and I are thinking along the same lines it seems, same thing here, anything of interest happens in this 'experiment', I'll report it.
  Fixed resistor seems to be the desired method, I wonder if a fixed coil/magnet [lock a speaker cone], or a speaker sharing current with a fixed resistor [say 16ohm speaker + 16ohm resistor]..might prove to be of some sustained interest.
 

[Johan]

yes, the Hertzog is basicly a fender tweed champ with a dummyload and a line out...considering the 3.5watt output into a 4ohm load being about 3.75volt rms, you might just build a booster with a tl072 and a 9volt battery...easier to carry...put a single cliping LED in the feedbackloop for that  "class-A" asymetrical sweetness..
j

[petemoore]

  Yealp...
  10ohm 5%, 5w resistor went to the Moonlight type amp output [~2watts, capable of making a loudish 12'' speaker].
  6SN7 > OT > 10ohm > 5e3 [15watt amp].
  The 10ohm didn't seem to be getting warm, after about 10 minutes of amp loading, cranked.
  Sounds like an amp output pulled way down...way too much potential and noise is going to be a 'huge' issue...as with any preamp, but more like...taking an amp output and amplifying that, what seems like a little idle noise is, and becomes a large facefull of noise floor with.
  So it is what it is..I'm sure I could get the noise floor down [plenty of room for improvement on this one..the PS for one thing].
  Actually it adds something cool to the distortion sound, and could probably be worked with, but the NPN Boost I built yesterday is more fun to use.
  I happen to have a Champ output [w/Blackface Preamp], it was easy and fun to tag the 10ohm in the Moonlight, and the results is pretty much as expected, all that amplification must be done with great care to prevent the noise floor from going right up with the amp factor.