nonHRM Spectra Conversion

[DennisF]

Guys many thanks for sharing your knowledge and inspiring clips.
Especially heisthl for sharing and documenting his inspiring conversion work.
I have been messing around with a nonHRM build for about 2 months and have finally got to a happy place tone wise and thought it was time to share a clip.
The clip is 2MB and can be found:
http://members.cox.net/nonhrm/DF-SNIP-a ... teight.mp3

The amp is built on a carcass of a Dean Markley Spectra using a salvaged PT from a Bell PA amp and a Bassman multi-tap OT from tubesandmore.com. There is a 12" Sammi in the combo cab that sounds pretty good with the amp but not a 1265.

The V1 is a 3k3-4.7uF/220k with a 3k3-22uF parallel on the cathode on a switch. This nets to a 1k6-26.7uF/220k that is a little less tight than the standard value.

The amp has a .05 mid cap value, 2 x .02 paralleled to the .01 again on a switch.

Using an ON-OFF-ON I am able to get the stock tonestack and cathode values in the center position, .05 mid-stock cathode, .05 mid - modified cathode up and down.

There is a .001 on a 500k pot for treble rolloff.

For tubes JJ, EH, Mullard Reissue in the PI, JJ 6v6 power tubes.
Voltages are a bit lower than the 200v target in the preamp 170-180 I think.

There is a D-Later in the loop with a EH tube. The D-Later is housed in a DIY Hot Box build that a re-appropriated for this purpose by creatively using the same board. Seen here as a hotbox:
http://members.cox.net/dennisfweb/hotbox.htm

For the clip:
The speaker is a 1265 in a closed back cab. Mic was a EV NDym 757. Using an Althrax backing and Audacity freeverb plugin for verb.
The guitar is a DiMarzio Strat with a Virtual Hot PAF in the bridge.

[mat]

WoW! Really good sound Dennis ! Cool playing too I can hear You are enjoying Yourself with that amp Congrats !

[keithrick]

I agree it sounds great! Nice job!

[HiGain]

Sounds nice! What were your settings?

Jake

[DennisF]

Thanks!
I appreciate the nice comments.

Sounds nice! What were your settings?
Jake

o'clock style settings, mid boost off, V1 cathode switch in the 1k6-26.7uF/220k setting, mid cap .05 OD input trimmer at about 9:30(22k to ground)
Gain 1
Hi 11
Mid 2
Bass 2
OD 12
OD Vol 12
Master 2
Pres 2

The dLater Output was backed off to drive the output section at a reasonable volume in a small room.

Voltages are:
V1
Lower cathode R / Higher cathode R
Pin 1-127 / 164
Pin 3-.976 / 1.46
Pin 6-164 / 168
Pin 8-1.46 / 1.49

V2
Pin 1-177
Pin 3-1.313
Pin 6-179.7
Pin 8-1.253

v3 270/266 on the plates