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dynacord BA300

Anyone here now restoring a Dynacord tube bass amp?

Me still.

Did a bit of work on the power stage of the G-2000. The preamp is currently dead - broken fuse holder. I need to check it "cold" if everything went ok and will proceed with the preamp section as soon as the power stage is up and running.


...Love the red tolex on this one...

Me too.

My Bassking is up an running again. Mostly; i still need to optimize the tone stacks of the input modules. And possibly increase the input impedance a bit by adding a serial resistor to the jack input. It lacks a bit of power - this Monday i drove it for several hours along the clipping point of its output stage.
Unfortunately it lacks the 1-V-output of the Eminents.

I built a new headshell for it. Red, of course. What else....

Headshell_fits.jpg


BTW: these days i bought an Eminent 2T for a good price. Broken plexi front, DIN inputs replaced by jacks but otherwise ok and fully original. Added a serial resistor to one input in order to increase its impedance, which is a bit too low for the demands of Humbuckers.
 
Since then I acquired an schaller v35. The Dynacord is at our bands place. Ive been thinking to pick up a dynacord slave amp. So i can use my 2x15 and 4x12 together.... What model would suffice for this task?

Do You mean Your BA-300? IMO that model is not well suited for You Idea. Its only additional output ist the 12dBm "studio output" from the output transformer.

I just checked the G-2000: that one has a 1-V input (reverb) and a 775 mV output (studio norm). The B-1001 - follow up of its bass cousin - as well as does the Gigant. Some of the smaller boxes, notably the eminents, have 1-V outputs as well as suitable inputs. The Imperator has just a suitable output; it might drive any Eminent or one of the larger boxes.
 
The obvious place to split would be the input of the phase inverter, at least if You stay within the Dynacord family - but there the signal is 6V. If You want to play both stacks You might consider bying another large Dynacord. The Gigant (that's the PA from the late 60's) should be easy to get. It has the same power stage as the BA300.

BTW: Du You run the BA300 in 220 V setting or in 240 V setting?

On the long term i think i will build a second headshell - for my new Eminent 2T.

PS: If You want to drive the BA300 to its limits, You might consider the following discussion in a German tube forum: Invalid Link Removed
 
The Eminent 2T is a dual mono/stereo head, right?

I have a pedalboard wich is WET DRY WET (meaning it goes tru some overdrive pedals then splits and one signal goes out (DRY) the other signal then get's processed by stereo chorus/reverb boxes and then leave the pedalboard....
 
bassking T's. Yup... Sounds like a plan.

I have a floorboard. Wich contains a preamp. A Mesa Boogie Vtwin. Wich can give my bass an overdriven tone. after that pedal it's split. One goes to the BA300. The other two go to a stereo reverb and chorus pedal. And a stereo synth pedal. A behringer 600 synthpedal. With expressionpedal. Nice.

So from my floorboard I have three lines going to an instrument amp. That's the plan. And to enhance modulation tube amps sound like a plan.
 
bassking T's. .

No, no Bassking Ts. The Basskings have only have the power of the Eminent 2. The corresponding instrument amps are the HiFi-Favorit 2 and the Imperator.

To sum it up:

a) small amps - 40-55 W

Bassking, Bassking 1, Bassking T, Eminent 1, Eminet 1T, Hifi-Favorit

b) larger amps - 80-110 W
Eminent 2, Eminent 2T, Imperator, HiFi-Favorit 2

c) The big ones - 150 - 220 W

Gigant, Gigant 2, A 1000, A1001, B 1000, B 1001, G 2000, G 2002, BA300

AFAIK only the PAs (ie, Eminents and Gigants) have 1-V-inputs as well as outputs and so allow chaining. All the others need to be modified. A matter i am pretty unhappy about - i would like to feed the imperator from the bassking.
 
I'm sorry if i am not clear. My bass goes into a pedalboard wich does wet dry wet. So i need three amps into their own speaker input. The center amp needs to be the loudest. Left and right are effect amps.

Please google wet dry wet. Usually used for guitars but can allso be used for bass.
 
Ok, meanwhile i have to 115, one DIY, the other bey Link Removed. Both run Eminence NEOs with high efficiency at a fairly high tuning. That gives a pronounced "upper" bass and so allows You to live well with the comparatively low power.

These amps need chassis with a large sensitivity and a construction yielding much power in the deep registers.