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Sorry if my post sounded like I am an expert. I am a trial and error hack. I don't know what kind of pre amp tubes you have in the Dynacord, but IIRC the Pro Jr comes with 12AX7's. I think that there are two in a Pro Jr. I experimented with different combinations of lower gain versions per the attached chart. I am at work right now, but I think that I ended up with 12AT7's for both, or a 12AU7 and a 12AT7.. Also, I don't know how hard on tubes the Dynacord is in respect to heat, but I had someone modify the circuitry to lower the heat via bias settings. That's about all I can contribute. Good luck!
Originally Posted by Little Jay
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06-08-2018 10:37 AM
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I used to have a micro cube, than I got a THR10 and sold the micro cube. THR10 is more expensive but is more versatile and has a sweeter tubey tone. Versatile because it's stereo so I use it also as my computer speaker. I like connecting both my computer (with analog speaker wire) and guitar to play over backing tracks or records. You can listen with headphones or speakers.
Both sound best clean. Light overdrive also sounds good. Especially THR10 as it does a decent tube simulation. Like any small practice amp, effects are mediocre at best and heavier overdrive levels not convincing, especially through the headphones. For overdrive tones using pedals can be a huge improvement, THR10 works better with pedals IMO.
That said, I also have a Princeton Reverb. It can run very quietly with the volume on 2 or 3 and even when it's at barely whispering levels, it's a whole different experience than any practice amp in any setting. Other tube amps I had were never satisfying like Princeton at low volume levels.
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I have an old Kustom 12T
They are great bluesy/jazzy/rockin amp .
Ebay's got one for $50.00 they have a single
12AX7 in the preamp and an 8" speaker .
Great little amp and small and easily moved about
the house and even in a small coffeehouse gig because
they certainly cut it volume wise for such a small amp
.
I have also a 95 watt Polytone Mini Brute III & a Carvin X-60B
60 watt tube guitar amp , this little Kustom 12T sounds great next
to them to with only 12 watts .
EZ :
HR
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when you say tote around, i think battery powered. i have, use and like a roland ac33 for that sort of thing. perfectly acceptable sound for playing around the house, especially since you want more cleans and you'll be putting pedals in front of it. if you don't want to go yamaha, that's an option.
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I think it is easy to go too microscopic on a thread like this. Carry an amp around the house?! I recommend a Twin with wheels.
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Yammie THR 10C all day.
Finally got one last year and it was an OK moment in the music shop when i tried it but it was a wow moment when I got it home!
Perfect for home and hipster coffee shop gigs. Line in with an iPod for cool sounds.
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Plus one on the Kustom Tube12. Excellent jazz tone from the 8" Celestion speaker, line out, headphone out, a couple nifty switches, and very light. I liked my first one so well I went back the next week and bought another. Terrific li'l amp! Originally Posted by Hurricane Ramon
I have an old Kustom 12T
They are great bluesy/jazzy/rockin amp .
Ebay's got one for $50.00 they have a single
12AX7 in the preamp and an 8" speaker .
Great little amp and small and easily moved about
the house and even in a small coffeehouse gig because
they certainly cut it volume wise for such a small amp .
I have also a 95 watt Polytone Mini Brute III & a Carvin X-60B
60 watt tube guitar amp , this little Kustom 12T sounds great next
to them to with only 12 watts .
EZ :
HR
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Interesting little amp! Never came across one, but it seems perfect for the little coffeehouse and resaturant diner-background gigs. Originally Posted by citizenk74
Plus one on the Kustom Tube12. Excellent jazz tone from the 8" Celestion speaker, line out, headphone out, a couple nifty switches, and very light. I liked my first one so well I went back the next week and bought another. Terrific li'l amp!
Seems put together pretty well:
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i have a Kustom 50 defender 1x12. Kustom amps are great value for money, completely giggable, all tube stuff, and you can find them for really low prices used.
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They are well built. Someone with the requisite skills could make the two switches (gain and voicing) footswitchable and wind up with a great studio or stage (when FOH is available) amp. It's a lot of tone in a tiny package! Originally Posted by Little Jay
Interesting little amp! Never came across one, but it seems perfect for the little coffeehouse and resaturant diner-background gigs.
Seems put together pretty well:
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Ha Ha, would love to have a Twin and may get one someday but there's no way in hell I'd be carrying that thing down two flights of stairs every time I want to change rooms to play. Originally Posted by Cavalier
I decided to purchase the THR10, received it last week, and it is one great little amp. When I have a lesson it's a great amp to bring along since it's also battery powered, and it sounds great. Thanks everyone for the help.
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The picture looks good, but I'd point out that it looks like the pots and tube are soldered into the PC board.
That's cheaper to make, but not as reliable as putting the pots and tube into the chassis and connecting to the PC board with short wires.
This is, of course, not at all unusual in a low-price amp -- and it's not uncommon in higher price amps.
Eventually, those solder joints will deteriorate from mechanical stress and the amp will malfunction.
The solution is to reheat the joints. Looks like that will require turning the PC board over -- so it's taking off all the knobs, removing the screws that hold the board in and clearing out whatever else is in the way.
This is not an argument against buying the amp. In fact, I gig with a JC55 that has the same issue and my Crate practice amp does too. But, I've had to reheat those joints on both of them -- and I bring a spare amp in situations where there's no PA or kb amp or something else I could use in an emergency. I'm just pointing out that this is not the best kind of construction. For a practice amp, why not?
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Rpjazzguitar, you are right: I prefer my pots and tube feet mountred to the chassis and wired to the PCB and not soldered directly onto it. The latter will most likely cause all kind of intermittent problems in due time. The worst was my Fender Blues Deluxe that had a 16v op-amp circuit to power the reverb but also the chanel-switch. When warmed up it would start switch randomly between clean and OD and woukd cut in and out! Drove me crazy untill I did what you did: reflow all suspicious looking solder joints.
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Has anyone tried the JHS Clover preamp pedal?
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