Ah ah.... I had a secret stash in my shed. I found a 50+60uF and a 50 uF . No 100 uF... But we'll see.
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dynacord BA300
- Thread starter Muziekschuur
- Start date
Today we did a powertest;
80 watts clean
156 watts cleanish
220 watts with distortion max..
We found one fuse to be faulty.... But why the amp played then is beond me..
Anyway, fuse replaced. One elco replaced. I'll replace the two others when I have a bigger order... the sound is still somewhat grainy...
The 8 ohm resistor wich I used to load became a bit smelly...
80 watts clean
156 watts cleanish
220 watts with distortion max..
We found one fuse to be faulty.... But why the amp played then is beond me..
Anyway, fuse replaced. One elco replaced. I'll replace the two others when I have a bigger order... the sound is still somewhat grainy...
The 8 ohm resistor wich I used to load became a bit smelly...
It should do 150 W clean (THD around 2 %).
Why it worked without the fuse: probably You mean the anode fuses.
The amp has a power supply with two high voltage branches, each with its own fuse. The 780 V at the anodes of the EL34s are reached by adding these two voltages. So if the anode voltqage fuse of the higher voltage branch fails the amp simply runs with a smaller voltage and about half its power. (The lower branch is also the supply for the screen voltage and the phase inverter.)
Why it worked without the fuse: probably You mean the anode fuses.
The amp has a power supply with two high voltage branches, each with its own fuse. The 780 V at the anodes of the EL34s are reached by adding these two voltages. So if the anode voltqage fuse of the higher voltage branch fails the amp simply runs with a smaller voltage and about half its power. (The lower branch is also the supply for the screen voltage and the phase inverter.)
Yesterday i had a look at the fuses of my imperator - same concept, but only two power tubes. The amp uses two fuses of 0.5 A each. Guess what i found in the higher branch? 1 A...
And traces of heavy wearing of the fuse holder - opening without a tool not possible any more.
(And guess what i found in the bassking - 2 A instead of 0.4 A...)
And traces of heavy wearing of the fuse holder - opening without a tool not possible any more.
(And guess what i found in the bassking - 2 A instead of 0.4 A...)
I posted this amp in another thread earlier: http://www.talkbass.com/forum/f15/50w-100w-valve-owners-thread-733582/index25.html
(Post 496)
It is a Dynacord Eminent II (Transistor front end). I hooked it up into an Ampeg 2*10" cabinet and it sounds great with my Jazz-mongrel basses.
Some observations: It is dead "quiet" except for a slight amount of mains hum. I will try out a noise gate pedal in front and see if this goes away. It runs very hot... The sound is very "hi-fi" but lets the character of the bass come through with flying colors. I haven't been able to crank it up or to take it to rehearsal, and I have the impression that in my current classic-rock setting I might need a bit more power. Thinking of hooking this to one cab, using the "aux" output to run a power amp into another cabinet, this should be a fun experiment.
I tried to find a seventies cabinet but it seems that they did not really have the guts that modern bass cabinets have so I might just use what I have and live with the looks. (Two Aguilar DB212s are a bit overkill though...)
All in all I have been surprised at the capability of this amplifier. They have been shunned maybe because of the plastic parts in the casing, as they seem to break or go missing altogether. I recently also heard another unit that had a terrible hiss problem - that could be a result of just the old age and lack of maintenance. As the amp did not cost all that much, I am very happy with it and consider it "a score".
(Post 496)
It is a Dynacord Eminent II (Transistor front end). I hooked it up into an Ampeg 2*10" cabinet and it sounds great with my Jazz-mongrel basses.
Some observations: It is dead "quiet" except for a slight amount of mains hum. I will try out a noise gate pedal in front and see if this goes away. It runs very hot... The sound is very "hi-fi" but lets the character of the bass come through with flying colors. I haven't been able to crank it up or to take it to rehearsal, and I have the impression that in my current classic-rock setting I might need a bit more power. Thinking of hooking this to one cab, using the "aux" output to run a power amp into another cabinet, this should be a fun experiment.
I tried to find a seventies cabinet but it seems that they did not really have the guts that modern bass cabinets have so I might just use what I have and live with the looks. (Two Aguilar DB212s are a bit overkill though...)
All in all I have been surprised at the capability of this amplifier. They have been shunned maybe because of the plastic parts in the casing, as they seem to break or go missing altogether. I recently also heard another unit that had a terrible hiss problem - that could be a result of just the old age and lack of maintenance. As the amp did not cost all that much, I am very happy with it and consider it "a score".
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Just a lil bump to all those Dynacord owners out there. Please share your stories and STUFF... (pics or it didn't happen)... Allso very interested in those KLEMT and Echolette amps and gadgets... There have a ton of Echolette devices been sold...
I scored a Dynacord Gigant on eBay. I hope the deal goes well, the seller is in the Balkans somewhere. 160 Watts of tube power!
rust_preacher said:I scored a Dynacord Gigant on eBay. I hope the deal goes well, the seller is in the Balkans somewhere. 160 Watts of tube power!
Enjoy replacing the tubes...
I worked for a shipping company for awhile. For the most part me and my coworkers took care of what we were moving as best we could.
But air was a totally different story. They're trying to get that from point A to point B so fast that handling gets rough. I routinely dealt with air at my facility. They'd select the guys who moved quickest for that. And at least at my facility it wasn't a simple move. We were throwing every single box almost five feet. The ones that didn't make it all the way got kicked onto the belt when we were done. The managers turned away as we threw boxes as it was against company policy for us to do that. Great workout. Almost as good as my experience unloading trailers for FedEx (hint: every single box, regardless of weight, had to be thrown at least 20 feet). I will never ship with FedEx after having worked there. UPS was generally top notch aside from air. FedEx was worse than what UPS did to air with every single package. I was literally throwing them as hard as I could. 5 minutes throwing, 5 minutes break to recuperate. I can't imagine how many Christmases I ruined.
But anyways, if you shipped ground it should be good. If you shipped air set aside the money to do a tube job. If you find any major problems call the shipping company and bitch hard. They're usually pretty good, if slow.
...sorry, been away. The seller did not respond so I put a case to eBay Buyer Protection. :-( (EDIT: Amp never was delivered, got my money back.)
Cool. Today we replaced a 50/50 qF capacitor and now he plays really cool again... Hip hip hurray...
And when the gain is on 9 I do get this awesome grit/overdrive... I didn't expect that... But it delivers...
Here is hoping it will keep up..
And when the gain is on 9 I do get this awesome grit/overdrive... I didn't expect that... But it delivers...
Here is hoping it will keep up..
Thumbs up for your effort. Dynacords are really built on a different servicing principle than early Fenders and Marshalls...
Yes, but if you get a hang of it the Dynacords are really easy to work on. And the steel frame has allso been built with heat dispensation in mind. It's built really clever... Heat goes up. So underneath and above an perforated iron and front and back closed. Way better than the traditional Fender/Marshall built..
