Andrew wrote: ↑Wed Feb 22, 2023 7:12 pm
IslandPink wrote: ↑Wed Feb 22, 2023 7:04 pm
How about £25 each nowadays ?
I should have bought more
More than that, at least the two I've bought were. And this is a perennial worry because I didn't get in when they were cheap. I found some NOS Siemens for sale from a Netherlands supplier at a reasonable price that seemed perfect, but he refused to sell to me because of the red tape caused by Brexit (which brought back my Brex-rage for several moments).
I eventually got a couple from Italy but that was 9 days ago, still waiting for them to get here. The supply on eBay seems to be drying up. I'm starting to wonder if I should be doing this at all if one of the key valves is about to become unobtanium or hideously expensive. Can the circuit be done with current production? EF86? There probably isn't an alternative. All that along with wondering if I'm just biting off more than I can chew.
There's these PCB's from waltube on DIYaudio which were designed around the Sowter RIAA and use fairly common valves - he developed the things using much better test equipment than I have access to, but of course I haven't heard them, haven't seen any write-ups, so I just have no idea whether they're actually any good or not. But I've heard the ref phono a few times and if I can at least get most of the way towards what it does, then I'll be pretty happy.
Given what I'm about to cough up for Dom Harper's cartridge, I guess I can't moan too much about the price of D3a's...