Search found 886 matches

by thomas
Wed Jun 12, 2019 10:30 pm
Forum: Everyones Projects
Topic: GK-71 - economical build.
Replies: 497
Views: 51662

Re: GK-71 - economical build.

IslandPink wrote:
Wed Jun 12, 2019 11:41 am
Good to know you're getting along OK with G2 at 625V :)
It hasn't blown up...yet.....! Actually it's a mere 550v relative to the cathode isn't it?!
by thomas
Wed Jun 12, 2019 1:06 am
Forum: Everyones Projects
Topic: GK-71 - economical build.
Replies: 497
Views: 51662

Re: GK-71 - economical build.

And here's mine for posterity..... No prizes for originality.....I started off with two 6n6ps which sounded very nice, but changed V1 to a 6n1p for a touch more gain, and played with the biasing until I thought it was about right. Ideally I think I could have upped the 320v and rebias and run a bit ...
by thomas
Tue Jun 11, 2019 7:28 pm
Forum: Everyones Projects
Topic: GK-71 - economical build.
Replies: 497
Views: 51662

Re: GK-71 - economical build.

Most big pentodes have that sort of limitation. For example EL34, Va=800, Vg2=500. Not sure there is a official answer other than it seems to work ignoring the value if triode connected and a limiting screen resistor is used. My GK71 amp (6n1p /dc/ 6n6p /Tx/ GK71 in triode mode) runs with a Va of a...
by thomas
Thu Jun 06, 2019 10:10 am
Forum: Assorted Stuff
Topic: Owston 2019 - Listening Impressions
Replies: 59
Views: 1511

Re: Owston 2019 - Listening Impressions

chris661 wrote:
Thu Jun 06, 2019 10:05 am
If the OBs are close to anything (walls, furniture) when installed at home, you're likely to get more lower-mids and bass. Time for more measurements :D

Chris

I thought you'd say that!

Actually I have mentally 'lodged' your measuring equipment recommendations......
by thomas
Thu Jun 06, 2019 9:37 am
Forum: Assorted Stuff
Topic: Owston 2019 - Listening Impressions
Replies: 59
Views: 1511

Re: Owston 2019 - Listening Impressions

I did flap around searching for the lost bass on my OB's on Saturday night, I must admit, although on Sunday Chris did his DSP magic on them which I think worked better in that room....now they are back home they sound err quite different, so much so that I removed the padding off the Lowthers last ...
by thomas
Sun Jun 02, 2019 10:07 pm
Forum: Assorted Stuff
Topic: Attendees Owston 1/2 June 19
Replies: 188
Views: 6221

Re: Attendees Owston 1/2 June 19

Yep I thoroughly enjoyed it, all the systems I thought were excellent, lovely to hear the ESL 57s and 211 amp, and a special thanks to Chris today who tuned and tamed my Lowthers.....
Looking forward to next year!
by thomas
Tue May 28, 2019 11:19 pm
Forum: Assorted Stuff
Topic: Owston '19 what are you bringing
Replies: 142
Views: 4510

Re: Owston '19 what are you bringing

I have a new Tower of Power- (a GK71 amp) I'll be bringing along, also my poor man's 'Quaser' style OB's (thanks DTB!) and my phonostage-on-a-bit-of-wood....
by thomas
Wed May 08, 2019 10:03 am
Forum: Assorted Stuff
Topic: Owston '19 what are you bringing
Replies: 142
Views: 4510

Re: Owston '19 what are you bringing

As for safety issues...err...spurred on by the loan of DtB's Quads, my weedy 801a's Tower of Power has just morphed into a GK71 amp....the HT is about 665vdc. Funnily enough even I'm getting a few pangs of doubt bringing this beasty up as is.... Resist those pangs dear boy, we need your amp, yes, w...
by thomas
Wed May 08, 2019 9:02 am
Forum: Assorted Stuff
Topic: Owston '19 what are you bringing
Replies: 142
Views: 4510

Re: Owston '19 what are you bringing

Just seen this..... I have a mercury spillage kit or two, I can bring one up. Although any risk of exposure is very slight, it's been identified and discussed so would be appropriate I think. However, much more useful I think, as the rectifiers are already in a contained chassis, would be to put the...
by thomas
Sat May 04, 2019 10:11 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 10468
Views: 670638

Re: Nothing In Particular

Noooo!

That's on my battery charger connectors, sure you can get male/ female connectors..... try yuasa search or somesuch....

something like this?

https://www.ebay.co.uk/p/Yuasa-Ypcringm ... 387&chn=ps
by thomas
Sat May 04, 2019 10:04 pm
Forum: Assorted Stuff
Topic: Autoitalia 2019 Brooklands (pic heavy)
Replies: 27
Views: 840

Re: Autoitalia 2019 Brooklands (pic heavy)

Very nice.....

I had a little friendly duel with a Lancia identical to the pic 9 down, coming off a Brittany Ferry, at Caen, way back ooh about 1989, I was driving a Triumph Vitesse, hood down....happy days!
by thomas
Tue Apr 02, 2019 2:36 pm
Forum: Assorted Stuff
Topic: Attendees Owston 1/2 June 19
Replies: 188
Views: 6221

Re: Attendees Owston 1/2 June 19

I'd like to come please sir?!

Saturday and Sunday. I might have finished a GK71 amp.....I might also bring my OBs....deffo bring my phonostage tho
by thomas
Sun Mar 17, 2019 9:14 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 10468
Views: 670638

Re: Nothing In Particular

Dave the bass wrote:
Fri Mar 15, 2019 10:38 pm
Our frogs are out of hibernation and currently wandering around and dozy as stoned rock music fans. Look at this brute, so camera shy.
Image

My lot were err 'busy' all week in my pond a couple of weeks back.....
by thomas
Thu Mar 14, 2019 11:22 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Motorcycling thread.
Replies: 433
Views: 32573

Re: The Audio-Talk Motorcycling thread.

Dave the bass wrote:
Thu Mar 14, 2019 7:52 pm
I'm getting the barrel on the 1960 RE Bullet rebored. I always wondered how it was done.

Now I know.

Well that cheered me up! I particularly liked the 'honing paste' he used.....
by thomas
Mon Jan 07, 2019 8:20 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Motorcycling thread.
Replies: 433
Views: 32573

Re: The Audio-Talk Motorcycling thread.

Ooooph!

Yep, not the sort of work I'd have hoped for!

Actually I was wondering if the piston had +.02 or somesuch on its crown.....

Edit: I've just seen you've err flattened it!