I love stereo! That’s why I got pretty excited when I looked at my Boss CE-3 chorus pedal and realized I could connect a pair of amps to the CE-3′s dual outputs and play my guitar in stereo. So I decided pick up two inexpensive Silvertone 1421′s (aka: Sears 10XL) off eBay. These are great little tube amps from the late 60′s and early 70′s. The 10-watt 1421 uses two 12AX7 tubes—one for pre-amp and the other for tremolo—and a single 7189 as the output tube. The 7189 tube is the industrial version of the venerable EL84, a tube found in so many British valve amps. The 12AX7/EL84 tube combination is unique to the 1421 amp within the entire Silvertone line, and compares it nicely by design to the original Vox AC4 Combo of the early 60′s.
This first amp is a beautiful 1971 model, completely original and in excellent condition. The Sears model number is 257.14211100. It probably sat in someone’s closet for the better part of 30+ years and was hardly played. Except for a power switch stuck in the “on” position, the old two-conductor power cord, and a little bit of hum, this combo is totally functional and sounds great. It even has its original protective vinyl cover (I’ve never seen a cover for these before) and its original tremolo foot switch. The original grill cloth is in great condition, which is truly rare for this model, even though it does have one cigarette-sized hole in the fabric. The speaker is an 8-inch Oxford Alnico magnet speaker that rings clear at low volume, but breaks up nicely when cranked (along with the tubes in overdrive). All in all, this little combo is a real sweet find! After I fix the power switch and replace the cord, I plan to keep this guy all original. I can live with a little hum for now.
The other amp is a 1970 model 1421. Also Sears model number 257.14211100. It’s in pretty good condition too, and is almost completely dead quiet (no hum) when running. But the original grill cloth was replaced and the tremolo is not working. Somebody already replaced the notorious power switch and the 2-prong power cord before I bought it. Unlike it’s twin, this 1421 has an 8-inch CTS speaker with ceramic magnet. I plan to mod this amp as my next project. I will need to work on the tremolo circuit, then replace the caps, ditch the ugly brown fabric, and build a new baffle board to hold a bigger 10-inch Alnico Blue speaker (think: Celestion). After those mods are complete, this 1421 should sound more British than American.
Then, plug these two into my CE-3 stereo chorus pedal and have fun!
A full Tone Gems review of the Silvertone 1421 will be in the near future.