Grog

Thanks Dave, I haven't listened to that in years! I have that brochure with the record still attached!

I'll bite once! I think we are a small group................ Somebody must have sold their collection of Low Impedance guitars to Chicago Music Exchange recently. They sold the Les Paul Personal & some of the others, but they still have several Low Impedance Les Pauls.

My son has the same guitar in a bass, it's called a Q-80. Same headstock, body & decal, even color, Ferrari Red. I read somewhere that Gibson was using up the parts from the Victory Series on these models. The bass has a bolt on neck whereas this guitar has a set neck.

Most of the circuit is built in the pickups, leaving only a battery in line & the normal pots, etc... Parts are kind of hard to come by on these, I've been keeping my eye open for another neck. Pickups seem to show up on eBay fairly often even though most sellers don't know what they are for. I've contacted Jules at Fly Guitars also, the serial numbers on his & the two of mine are within five numbers! He & I have two of the few Ferrari Red 20/20's I've been able to locate. I've seen a total of four posted on the internet.

They have a cool baseball bat neck, the balance is good. The sound is a bit thin for some tastes. It has active pickups. This catalogs binding cracked when I opened it, ouch!!

Hi, I have both colors, Ferrari Red & Luna Silver, (to my wife's dismay!) I have most info available on them, I'll post it in a few days. Walter Carter thought that only 12 were made, the concensus on the Last Bass Outpost is that there are less than 100. If you search for Gibson 20/20 on ebay, a few advertisements pop up.

I went through a bunch of old photos & found a few of changing the filter caps on my GA-5T Skylark.......... Mine is the model that came out right after yours.

If it were mine, I wouldn't change a thing, since you don't have any hum at this time. It is true that most filter caps don't last as long as yours has, but unless you plan on using it as your main stage amp and reliability is important, it's working fine now. The tremolo is hopefully an easy fix, maybe a tube or spray the frequency pot with tuner cleaner. Schematics are readily available online. Most of the Crestliner amp series are prone to corosion on the amp chassis, yours is spotless! That brown capacitor, with the #2 on it is the death cap. Caps like that are hard to come by, modern replacements work fine, you just have to mount them in such a way that doesn't allow anything to short out against the chassis.

Congrats! That amp is in "MINT" condition & all original. On an amp like that, that has made it almost 50 years without being molested, I hate to change anything that doesn't need to be changed to make it functional. If the amp has a hum, (that is not from a bad filter cap), just turn the ac plug 180 degrees & the hum should go away. I have a GA-5 & GA-5T from the '65-'67 era, fun little amps! Does yours have a RCA jack on the inside chassis for an optional footswitch?

I know that there have been several threads on the MK Series, I have a MK-35 & a MK-72. After gibson abandoned the Kasha design, other builders picked up on it & made high end guitars using the same bracing design. I ran into these on ebay.......... http://www.ebay.com/itm/Vintage-Steve-KLEIN-Classical-Nylon-String-Guitars-/190440986665?pt=Guitar&hash=item2c572ad829

http://cgi.ebay.com/Gibson-Mini-Humbucker-chrome-NEW-WW-ship-MH-R-Neck-/380342786084?pt=Guitar_Accessories&hash=item588e325824 http://cgi.ebay.com/Gibson-Mini-Humbucker-chrome-NEW-WW-ship-MH-T-Bridge-/380349220778?pt=Guitar_Accessories&hash=item588e9487aa

It looks to be all origonal except for changed pickups, I think they might be DiMarzio Tone Zone P90's. http://www.dimarzio.com/pickups/soap-bar/tone-zone-p90

The bass is mine. I bought it over ten years ago. It is a bad refin. My intent was to restore it back to it's origional color, just haven't gotten around to it yet.

The built in Fuzz-Tone sound kind of like an Electric Fart! There is quite a delay in the attack, depending on how hard you pluck the string. It was kind of an odd combination that really didn't sell well. Only about 250 of these sold in three years.

I have an original copy of the "Gibson Amplifier Master Service Manual". It doesn't list a GA-77RV. The GA-77 looks to be from 1953-54. I have infor on GA-77, the two versions of the GA-77RET and GA-77RVT. I have a later version of a GA-77 RET with the Tel-Ray Oilcan Reverb & 15" JBL.

1974 looks about right to me also. In 1975, Gibson used a small decal, with the serial number and the model on it. A SG Standard like yours, can only be a 1973 or a 1974 with the last of the six digit serial numbers. In 1971 & 1972, the model was replaced by the SG Deluxe.