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Old 22nd April 2003, 08:06 PM   #1
JDeV is offline JDeV  South Africa
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Default KT77 or EL34

Which of these 2 sounds the best? I am bussy restoring 2 x Mullard 5-20's and can get both tubes but can afford only 1 type. Have anybody compared these 2 soundwise?
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Old 22nd April 2003, 08:11 PM   #2
EC8010 is offline EC8010  United Kingdom
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Buy the KT77 quick, sell them to the guitar boys and buy plenty of EL34 on the proceeds! Good grief, how do you manage to turn up this stuff? KT77 is very rare.
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Old 22nd April 2003, 08:19 PM   #3
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Quote:
Originally posted by EC8010
Buy the KT77 quick, sell them to the guitar boys and buy plenty of EL34 on the proceeds! Good grief, how do you manage to turn up this stuff? KT77 is very rare.

Hmmm....may we know what do you have against KT 77?
Did you work with this type,and,if yes,wich brand?
...just for my curiosity....since "they'r very rare"......
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Old 22nd April 2003, 08:39 PM   #4
EC8010 is offline EC8010  United Kingdom
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I've nothing against them at all, however, I see what you mean, my post reads as if I don't like them. I have never used them, so I don't have an opinion on sound, merely on their price. They were made by GEC, and are respected as being superb valves that musicians will pay an arm and a leg for. I am assuming that JDev has found GEC examples, not dodgy copies.
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Old 22nd April 2003, 08:47 PM   #5
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Default OK!

Quote:
Originally posted by EC8010
I've nothing against them at all, however, I see what you mean, my post reads as if I don't like them. I have never used them, so I don't have an opinion on sound, merely on their price. They were made by GEC, and are respected as being superb valves that musicians will pay an arm and a leg for. I am assuming that JDev has found GEC examples, not dodgy copies.

THX,EC8010!
This is the answer I expected for....
I'd say,rather keep those 77's for an "audiophile" application,(especially if they're valuable GEC's or something similar),and let go the 34's in favour of anyone who wants them,guitarist or not.
My opinion? I have a visceral disgrace against almost any kind of EL34,especially in home systems,and EVEN in guitar and bass amps....well,the ones I can stand are really NOS and outrageous expensive.
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Old 22nd April 2003, 08:48 PM   #6
JDeV is offline JDeV  South Africa
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Quote:
Originally posted by EC8010
I am assuming that JDev has found GEC examples, not dodgy copies.
Unfortunately I will only find out tomorrow what brand they are, I got hold of an old guy that used to repair and build all types and sorts of audio stuff, now retired and lots of equipment and things up for sale. He just said he got some of KT77's and I must come around to look at them.

The EL34's I can get are definately Electro Harmonix - any opinions on them?

P.S: Mean nothing bad with "old guys" - they are usually very knowledgable and usaully got good advice, if they are not too old yet
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Old 22nd April 2003, 08:52 PM   #7
JDeV is offline JDeV  South Africa
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Default Re: OK!

Quote:
Originally posted by Le Basseur
My opinion? I have a visceral disgrace against almost any kind of EL34,especially in home systems,and EVEN in guitar and bass amps....well,the ones I can stand are really NOS and outrageous expensive.
What would you then reccomend to use in place of EL34 in case KT77 is no more available or maybe cheap copie - not org. GEC ?
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Old 22nd April 2003, 08:54 PM   #8
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Quote:
Originally posted by JDeV




The EL34's I can get are definately Electro Harmonix - any opinions on them?


In this case,you really have no choice :run like hell out of the EH tubes,they're REALLY "guitar" tubes (no matter what this involves,good or bad....sorry,fellow players,nothing personal....)
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Old 22nd April 2003, 09:05 PM   #9
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Default Re: Re: OK!

Quote:
Originally posted by JDeV


What would you then reccomend to use in place of EL34 in case KT77 is no more available or maybe cheap copie - not org. GEC ?

I can hardly believe that your older repairman has some cheap (....Chinese?Patagonian?) KT 77's.
As EC 8010 said,the most known maker is GE,but I suspect some surprises for you tomorrow....these old guys are full of surprises,especially if they see the younger generation being very much in the domain they loved soooo much....
About your question on an eventual replacement,hard to say...if you use some other (better) output tubes,you'll have to modify a little the entire output stage (another OPT,maybe?),and surely the driver stage.In this case,the resemblance with the original amp,both electrical and as a layout will differ,and I'm not sure if you want to go the hard way all along.Eventually,I'll stick to some 6L6's or 5881's.Again,if the overall schematic permits the change and the pain of modifying is acceptable to you.
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Old 22nd April 2003, 09:08 PM   #10
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Default Eh.

Hi,

Quote:
The EL34's I can get are definately Electro Harmonix - any opinions on them?
Yes, I do.
They're made by Sovtek and are fine EL34s by todays' standard.
EH selects them for ruggedness and I don't see what anyone could have against them.

Naturally if you can lay your hands on genuine NOS Mullards or better still the metal collar Telefunkens than that's another story.

While you check out the KT77s, which are about the best EL34 equivalent you can get, see if they have the GEC sticker on them.
And if they are in the original GEC boxes than you might have hit gold.
In my entire business life I only had one single opportunity to buy some and that is more than 10 years ago.

Let me tell you, if I had an opportunity like yourself I'd try to buy all the "old man" has, OPTs, chokes, PTs whatever he's willing to sell.

I am sure sure other members would feel the same way.
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