Can I use EL34 tubes on KT88 amps?

Does your manual say anything about alternative tube choices? Sometimes you can substitute, and sometimes you can't, I think it depends on the circuitry among other things. Perhaps you should contact Melody.

All Primaluna amps can use EL34 or KT88 tubes. I hope that gives you another option if you want to switch back and forth.

I sent email to Melody last week but have not received any response so far. The owner's manual does not mention anything about alternative tube choices either.

Don't be surprised if you don't get a response. Manufacturers in general are VERY poor at responding to E-Mail.

I noted in Stereophile an ad for Melody products which are apparently being re-introduced to USA. Try calling the new dealer/distributor and see if he will help.

You can contact the new distributor at [email protected] with Melody questions. I already sent him an email about this and will report back when I know.