Fromel mod for a Fender Custom Vibrolux Reverb : Other Amps : The Gretsch Pages
Anybody knows what year it is? This mod is relevant only for two-channel amps with normal and vibrato channel. The reverb knob on the vibrato channel will have no effect any longer. Twin 6G8; Showman 6G14 First tube is first channel preamp, 7025 is specified. Since then, James has served as a writer for several music, technology and design publications. A low noise, low microphony tube is recommended here. The following charts are the revised dating tables for Fender tube amps.
After 1968, most Fender tube amps switched to solid-state rectifiers, until recent Custom Shop models reintroduced tube rectifiers. Use the latest one to give you a good idea of when it was made. Small, light and, like all Blackface Fenders, built like a tank, Princetons are a favorite of many guitarists and harp players for studio and live use. Eventually, the hope is to have enough info for a more detailed breakdown on the B series, A+6 digit and F+6 digit series. The mod will give you mulitiple and flexible speaker output impedances where the external speaker output jack serves as a secondary independently speaker output. Fender offered a full range of amps in their Blackface line, ranging from the diminutive Champ to the massive Twin Reverb. Built like a proverbial tank, these 50-plus-year-old amps will be rocking way into the future.
The Vibrolux Reverb would be the same. Here is a list of the first letter showing the year of manufacture. The type of face, grille cloth, type and number of speakers, type and number of knobs, etc. . If you really want to impress your friends, go to and order the list of parts I linked to. This '68 Custom Vibrolux reverb is an interesting amp? We often find the reverb sweet spot around 2.
It was loaded with one Weber 10A150 and one Jensen C10q delivering together a decent, loud clean sound and with firm lows. The first 3 digits on a pot, or the first 2, 3 or 4 digits on a speaker are the source or manufacturer code. In addition to reverb, it featured a middle control on the Vibrato channel, enabling players to tweak treble response. Paul worked with Greg on their small box brown Twin myth busting research and is extremely knowledgeable about Fender amps in general with a specialization in the brown and blonde amps. These letters are the production date code for the amplifier.
Vibrolux models 6G9A, 6G9B, 6G11, 6G11A; Tremolux 6G9A First tube is first channel preamp, 7025 is specified. We understand that some technicians recommend Ei or Preferred Series 7025 for this duty. It would have been very costly to destroy these units so two remedies were implemented. I believe that Pyle bought out Utah Speakers. The Vibrolux will have very little issue with volume until your gigs get pretty big. According to Fender, amplifiers produced through 1969 have a sticker near the tubes. Here is a video that gradually demonstrates the effects of some of the mods and tricks described here.
Logical schematics: Layout: Click images for full size versions. If you ask they will be answered. It is very practical to carry with you those small Sovtek plastic adapters that quickly and easily replaces the rectifier tube. Advances have been made with regards to the production of 1960-67 tolex amps and it appears that much of this information can be applied to late 1950s tweed amps as well. If so, read more about the cap in the next bullet point. This tube should be of good quality.
His passing is a great loss to this research team and the Fender amp aficionado community in general. The effect of this mod is similar to pulling the V1 normal channel preamp tube when playing the vibrato channel. I will not accept a return that requires shipping, since every shipment adds to the possibility of shipping damage. Click on that button and navigate to where your photo is and insert it into your post. Another anomaly was observed in 1961 with the 6G6-A Bassman.
You may use them independently and the ext speaker jack does not require the main speaker jack to be plugged. Just grab your guitar and this little powerhouse and head out to the gig. Thanks and I swear I'll search next time before starting a thread. This tube need not be low -noise or low-hum, nor does it need to be tested for microphony. This is the tremolo vibrato oscillator and driver.
Now that we're all curious, posting some pics would be fun. People describe these tubes to have less harsh and buzzy distortion. Items must be returned in original, as-shipped condition with all original packaging. Inexpensive Russian 5U4Gs are readily available and suitable. In a case like the Deluxe Reverb, you have a 1 x 12, combo powered with 2 x 6V6 tubes at 22 watts.
This tube need not be low-noise or low-hum, nor does it need to be tested for microphony. Tone wise they are a modern interpretation of the Vibrolux, but don't really sound much like a vintage one. If it's a one-digit number you need to determine the correct decade of the amp some other way. Some amps are sensitive and difficult to control the reverb on. Finally we point out location of components in the physical layout diagram. There are other ways but the above is a more accurate method. Clocking in at 85 watts, these amps were clearly designed for large venues.