Hey new to the forum here. I just picked up a Silvertone Model 1472 112 combo. It fires up and works but takes a long time to do so. It seems like it needs at least 10 to 15 min to warm up enough to get any volume other wise it is weak and not much there until it warms up enough. I know Tubes need time to warm up but this takes longer than normal. Any ideas? I suppose I will have to give it a cap job and tubes to make it right. I bought this for a project amp so I do not mind putting some parts and time and money into it. I paid 50 bucks cash and traded a beat up cheapo Harmony electric guitar that some one gave me and I put on a set of strings so I really only have about 60 bucks total into this amp so far. Any one know what the wattage was on these? I know the 1482's were rated at about 15 watts but I have not been able to find what the 1472's were rated at? Tubes are 2- 6v6's 2-12ax7's a 6au6 and a 6x4
Replace all electrolytic caps plus the tube cathode bypass caps. Make sure coupling caps are not leaky as well. A leaky coupling cap will draw down the voltage on the small preamp tubes until they lower in leakage after a brief period of time (no sound). Another issue is a poor solder joint on a grid leak resistor or the resistor itself. I believe some of the tubes are most likely shot as well. Tubes warm up in 11 to 15 seconds or so.
A pair of 6V6 are normally rated for 15 watts, possibly up to 20-watts with 370 volts B+.
A pair of 6V6 are normally rated for 15 watts, possibly up to 20-watts with 370 volts B+.
Well first things first I will get the tubes checked. Got a tech who will bench test them at the reg voltage ect and let me know if any are weak or bad he will also match any replacements. I did a visual inspection today and the resistors and solder joints all looked good at least non burnt ect. The caps did not look bad but of course I would replace them anyway. The can must be ok sofar as there is no 60 cycle hum. If tube replacement does not do the trick or if they are all good I will do a cap job and probably the resistors too as there really is not that many of them in this circuit. Thanks for the info guys. I appreciate it.
I should clarify most of the caps were good there was one bad one. The tech did not specify which. He is on the mindset that if the caps are good do not replace them as they are vintage and better than some you may get today? Some may agree or disagree with this I have heard it both ways. I guess I feel if they are still in good working order why replace them.
Thanks Nigel. First of all the tech who is checking this out for me is a musician and loves tube amps. He plays through a old vintage Ampeg. Second I would guess he is about my age middle 50's or so and he grew up working with tube stuff. His dad was a Electronic repair man back in the heyday of tubes and repaired most every thing including amps, radio's, TV.s ect and he learned from his dad from the time he could hold a soldering gun so he knows his stuff. So what he has done for this amp I feel is the right course. Besides getting the amp up and running He converted for me one of the instrument jacks it was used to make a preamp out so I can preamp out to a larger amp or PA. Kinda like having your cake and eating it too. 
This model has no reverb but does have a nice sounding tremlo. Verb is not a problem these days some of the pedels have a decent sound. Maybe not as good as a good spring unit but pretty close. Good enough that the average joe is not going to know the difference. In fact some my digitech PR80 reverb settings sound better than some spring verbs on some amps. I like my crate G60 but the reverb is nothing to write home about I use the pedal instead.
Got the amp back and it works perfect now to make a better cabinet out of Pine and maybe a more efficient speaker though the speaker in it does not sound that bad. The Preamp line out he did is excellent running it into the low input jack of my Crate and setting that amp flat works excellent and the preamp tube sound really sounds nice through th crate. Plus I can tweak the sound on that with the bass, treble and Mid pots if I want to. Now I have to set up my digitech PR80 with a setting that will not have any amp modeling just the reverb to give the amp verb and set up acouple more with verb and chourus or delay or flange with out amp modeling so the sound of the Silvertone stays origional with effects. All in all with the preamp out and the amp working great it gives me a lot more versatality now having the preamp out.
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