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AUDIO FORUMS >> Replacement Tubes >> Question regarding old Valvo EL 84 tubes
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Message started by wingnut on 06/07/06 at 22:39:58

Title: Question regarding old Valvo EL 84 tubes
Post by wingnut on 06/07/06 at 22:39:58

I pulled a pair of Valvo EL 84 tubes from an old Grundig radio. I have a SE 84 C amp. What is the best and safest way to check if these tubes are good? I was not able to power up the Grundig to see if the tubes worked in it. I do not have access to a tube tester.
Thanks! ???

Title: Re: Question regarding old Valvo EL 84 tubes
Post by ARBY on 06/07/06 at 23:23:37

Plug it in. I have a quad of Valvo e84l red print that I used in my Select Ex for over 4 years now. Very good sounding and very rugged

Title: Re: Question regarding old Valvo EL 84 tubes
Post by Hotsauce on 06/07/06 at 23:59:59

Send them to me, I will test them.

It will take years to complete the test.

John C.

Title: Re: Question regarding old Valvo EL 84 tubes
Post by wingnut on 06/08/06 at 00:38:25

Hotsauce,
I think I'll test them here first. :)

Title: Re: Question regarding old Valvo EL 84 tubes
Post by lightmaster on 06/08/06 at 15:28:42

Valvo are indeed nice(but then again that says nothing, some of my mullards are branded valvo, some are produced in Holland for philiphs and so on, what are the tube's codes that will give us something to work with., the VAlvo (holland) that i had were good, but just short of the mullards tough, but close and my second choice, in a 10 types of el84 test/comparison.

TEST the tubes!!!!!!
a MULLARD el84 that I put in my amp burnt something inside lucky me that was one day before the amp was due to leave home for a full EV massage.

Always test the tubes! find a shop that has a tube tester in your city, thatb is my advice.

Sure I do it every time now.

Title: Re: Question regarding old Valvo EL 84 tubes
Post by wingnut on 06/08/06 at 22:19:37

Thanks Lightmaster,
I am going to have them tested when I find a local shop. The "markings" on the tubes are FX 3 DG 9. The "F" is faded, so I am not sure if it is a "F" One has 025 on the top,the other has 127. The radio they were pulled from was purchased in 1958.

Title: Re: Question regarding old Valvo EL 84 tubes
Post by lightmaster on 06/09/06 at 11:17:11

hum, let me get a stab at it

Well they are indeed made by Valvo in Germany at the Hamburg plant

F X3 it's the type of tube's construction.

G suggests 1957, 9 September. it is strage tough that the G is before the numeral (9), in all the ones i have seen its normally the other way around?????

In that case they should be made in July 1959, I think the latter to be the more likely case

and yes do test them before using them. if they work you will be a very happy man :)

f