5881 Replacement for 6L6? - CORRECTION 6L6GB

[Bry Carling]

There are some differences. Maybe the transfer characteristic 
curves are a little different...  
I am not sure what thediffereneces are, but...  I once tried 
putting a pair of 5881s into a guitar amplifier designed to use 
6L6GCs and it sounded pretty terrible!

> Hi Doc,
> 
> I would definitely use the 5881 pair.  The RCA RC-19 tube manual 
> gives the 5881 a somewhat greater maximum rating in both plate volts 
> and watts but for "typical operation" and "average plate 
> characteristics" the reader is referred to 6L6GB.
> 
> I'm told that the 5881 is a milspec 6L6GB.
> 
> The 6L6GC is the next generation and has even higher maximum ratings. 
> Think of the 5881 as a slightly beefed up 6L6GB and the 6L6GC as a 
> major step up.
> 
> 73,
> Rich KB8TAD
> 
> 
> At 4:22 PM -0500 11/18/07, kd4e wrote:
> >Just looked at the specs for my Multi-Elmac AF-68 (chose
> >the AF-68 instead of the AF-67, swapped the AF-67 for a
> >PMR-8) and observed that the modulator tubes are 6L6GB's
> >rather that the metal 6L6.
> >
> >Why would they have chosen glass vs metal?
> >
> >Modifying my original question a little:
> >
> >If the AF-68 is designed for the 6L6GB which of the
> >following are likely to be acceptable & which better
> >than than the 6L6GB in the AF-68 (it will be both base
> >and portable so resilience to vibration is valuable)?
> >
> >6L6
> >6L6G
> >6L6GA
> >6L6GAY
> >6L6GC
> >5881
> >Other?
> >
> 
> -----------------------------------------------------------
> This list is a public service of the City of Tempe, Arizona
> -----------------------------------------------------------
> 
> Subscription control - http://www.tempe.gov/lists/control.aspx?list=BOATANCHORS
> To post - BOATANCHORS at LISTSERV.TEMPE.GOV
> Archives - http://listserv.tempe.gov/archives/BOATANCHORS.html
> 

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.aspx?list=BOATANCHORS
To post - BOATANCHORS at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/BOATANCHORS.html