Mesa Boogie Full Revalve Kits / Mesa Triple Rectifier Harma STR Stan Gain 5881 Full Upgrade Kit

Mesa Triple Rectifier Harma STR Stan Gain 5881 Full Upgrade Kit Mesa Triple Rectifier Harma STR Stan Gain 5881 Full Upgrade Kit Click on image(s) above to view larger
£280.00
£224.00

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All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.

These are specially selected full revalve kits for Mesa Boogie owners. The sets consist of specially position selected pre amp valves that have been selected for each position in your Mesa. We have 2 pre amp kits, Standard gain, to give a warm and fat overdrive and Our Classic kit provides boogie owners with a valve close in tone to the vintage Mullard ECC83. In terms of 6L6GC we have selected sets available that will work with the boogies fixed bias arrangement. Certain 6L6GC will be better for certain kinds of music and these we have indicated in our product description.
20% Discount


This full revalve kit consists of a standard gain Pre amp kit combined with the Harma 5881 output valves and a set of USA made 5U4GB rectifiers. This kit is for the Mesa Triple rectifier range where fitted with 6L6gc types. It is designed to give your Mesa Triple rectifier more clarity, smooth warm overdrive with tight fat punchy lows.

The Harma ECC83 STR is used as it has a number of advantages over other 12AX7 types such as reduced microphonics and better isolation from vibration. This is particularly useful in combo applications. The valve is very well balanced with nice even bass which has plenty of depth. The mid-range is clean and transparent which removes the mush and fizz that happens when Boogies are overdriven.

The Harma 5881 is the original Military grade button based item that Mesa used as the STR-425.This valve is one of the most reliable 6L6 types ever built with decades of use in Military applications. If you scoop out the mids then this is an ideal choice as this valve does not go thin and tinny like some 6L6GC.

The 5881 is very aggressive sounding when really pushed which is great for metal riffing and chording. Solo guitar and fast runs also cut through the mix and the valve also remains tight with dropped tunings. The Harma 5881 produces a well-balanced thick sound that is ideal for Metal, Hard rock and fusion styles.

The rectifier is crucial as it needs to supply the correct voltages to the power valves and we have found no better than Original JAN specification 5U4GB made in the U.S.A by Philips.

In many users opinion the Jan 5U4GB was the best of its type. The valve features a ruggedised vibration proof box anode construction, Top and side getter to ensure that gas free evacuation was achieved and to maintain the vacuum at its best. The valve has high grade filament isolation so even after long periods of use the filament will not degrade.

The valve also has a higher current capacity than a 5U4G so is many players choice is Mesa Boogie Dual and Triple rectifiers.

The kit consists of 14 valves.

4 Specially Selected Harma ECC83 STR for position V1 toV4.
1 Specially Selected & Balanced Harma ECC83 STR for V5,
6 Specially Selected Harma 5881/6L6 Military spec output valves
3 Specially Selected Philips USA 5U4GB rectifiers

Please note that this kit is for the valves only

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