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View Full Version : FS: Radford STA25 Series III Power Amplifier



yolakim
06-02-2021, 14:04
https://i.imgur.com/Hxapc6b.jpg

I bought this only last January from Wegamus on AoS and it was an improvement on the STA15 I had at the time, so decided to keep it. During the first lockdown, I sent it down to David Coe (AD Audio) and he serviced and renovated the amp, including:


New valve runners (from Radford Revival) and valve sockets
New RCA sockets
New Audio Note speaker binding posts
New mains switch
New cathode bypass capacitors
Silver mica capacitor upgrade
Rewiring all the valve sockets
Mills cathode resistor upgrade

https://i.imgur.com/5vak2JV.jpg

I'm not going to pretend to understand the technical aspects of everything he did, but the amp came back looking and sounding fabulous - a big improvement, like a veil had been lifted from the presentation. It still hums a bit in my room, but my STA15 did too and I believe Radfords do this to some degree - if this is likely to bother you (i.e. you sit right next to your equipment when listening) then this is probably not the power amp for you.

https://i.imgur.com/tyzlvYv.jpg

The amp came with 4 x Genalex Gold Lion KT77 reissues which sound great, but I bought some Amperex branded XF4 (Mullard) EL34s (at nearly £300) that I preferred (thanks Barry for the recommendation). It currently has Telefunken EF86 and ECF82 valves installed, but will also come with used pairs of Tesla EF86, Svetlana EF86 and what look to be Bugle Boy ECF82 valves, though I don't know how many hours these have on them. All these will be supplied with the amp so you can tube roll to your heart's content! It also has a 2A Synergistic Research SR-20 fuse fitted.

https://i.imgur.com/55iFmSe.jpg?1

The service cost >£500 and the tubes £300, so I am asking £2,000 for this - no offers please.

I travel within the midlands a little, so delivery might be an option or a socially-distanced meet somewhere (I'm based just south of Coventry). I have a slightly tatty, but strong box that I used to send this for the service, so shipping is possible and will be around £40 with UPS, but will be at any buyer's risk. You can obviously arrange your own courier if you prefer. I will remove all valves, package and send them separately.

https://i.imgur.com/6MU5PlH.jpg

I thought this was going to stay with me for a long time and I will be very, very sad to see it go as I feel more of a relationship with this amp than any other. But the itch to try something else has left me much poorer and I don't have the space to keep it. I am sure it will not be my last Radford.

https://i.imgur.com/kyplyom.jpg
https://i.imgur.com/XLkNgqs.jpg

WESTLOWER
06-02-2021, 18:29
David spoke to me about this great amp when he was working on her.
He was very complimentary about it. Fair price with the fantastic valves and service etc.

I had to spend double this to better the STA25's performance.

A rare chance to nab one...
Shouldn't hang around for long.

ovlov854
10-02-2021, 17:37
Great pictures and description. Great long term prospect..........and serviced/upgraded too
Good luck with your sale Kim

yolakim
16-02-2021, 18:58
Thank you for the kind words Adam and Martin.

Quick edit to the listing. Turns out it DOESN'T have an SR-20 fuse installed! I've hunted everywhere for it, but suspect I left it in the STA15 I sold last year. Sorry.

I will though include a pair of brand new Telefunken ECF82s in addition to the used ones mentioned above - bought new from Watford Valves as spares.

Listening to this now and sounds truly great. Thought of selling this amp makes me feel sick, but I've bought the others now and so it must go.

Wegamus
16-02-2021, 22:27
As Kim mentioned, this was my old amp. It was lovely when I had it, so must be even more so now it’s been thoroughly serviced. I bet it would be a dream with my Falcon LS3/5as! GLWTS :)

yolakim
20-02-2021, 21:15
Sorry, withdrawn from sale.