audio-talk

Also you'e running a 100k pot into two parallel ECC83's, whose input capacitance is whatever it is grid to anode (Ca-g, can't remember the value) but then multiplied by the gain Hmm, good point that, its going to be about 2 * 250pf, and if we assume at worst 50k from the pot,that gives a -3db of on...

Perhaps she should have put the amp together for you ? :lol: :lol: :wink: Cheeky wotsit :lol: Achally I built the buffer from a kit of parts and it worked first time and in true cheapy-chinese kit tradition it had a few 'anomalies' shall we say in what was on the cct diagram (not included!) and wha...

pre65 wrote:Looking good Dave !

Have you got an active pre ?

Thanks Honey Pie , so are you...!

I'll have a buffer/unity gain amp on Christmas Day I predict.... would you believe it but my Mum bought a Chinese kit and built it just in time to give it to me for Christmas.

What a Mum eh

DTB

Hi Dave and well done! These direct coupled amps can get a bit addictive so watch out for monkeys and DRDs :D Steve Thanks Steve, yep.... they both could be up for 'doing', I think it's the DHT thang that I'm really liking, there's just summat that I really like in these Valves. When I've heard 'it...

My guess is that a touch of 2nd harmonic is setting in causing the treble to sound sharper. Well done, by the way. -- Andrew Thats a good point Andrew, I hadn't thought of that. I was thinking more along the lines of impedance mismatch between the line-out of the walkman and the LW. I've only a shu...

simon wrote:We want photos!

What...of the JellyBaby's? We're veg, they'll problee have Gelatine in them which could seep into our brains via our tear ducts if we look at piccies of such things...

S'true y'know.

DTB

Hooray! three cheers and all. maybe your top end will come back. :) Thank You, yes I hope so. The bum-end is very fullsome so maybe it's luring me into some false perception. I'll try more musics and fiddling tomorrow. One think I did notice is that as I turn the Volume up to max (when the chippies...

Now look.... get a pair of Fostex FE127's and some 12mm ply....i wont tell ye again alright.....

Pop round if you want to hear them Mike, bet you'll kick yourself when you do....

DTB

No nails were used in this build young sonny-mah-jim :lol: Got both channels up and running after work. HT sitting happily at 445V after a smidge of a cap tweak. That big monster Toroidal has some grunt, i look at the spec the other day 720V Ct'd at 500mA per winding... the 6.3 heater taps are 5A ea...

Here's Tina T singing my new signature song.... Go girl.... http://i195.photobucket.com/albums/z109/davethebass1/tina_turner_wallpaper_11.jpg Success :) I'd got the o/p TX connected wrong, I had it hooked betwixt Anode and and the 0V rail I have to confess. Whats the word for a male reproductive mem...

Seriously Mike-single driver speakers can be the dogs dangly bits ! 8) Yeah yeah...Tell him (Grand) dad :D Try it Mike, you might like it. I heard a pair of Scotts 6ft tall 4" FR driver cabs at my first ever DIYfest, I was gob smacked. I built the little Fonkens as when Ju and I go away on Hol...

Check you haven't got heater supplies referenced to HT and Gnd at the same time Will do Nick, the LT supplies aren't CT'd as per 'proper' LW instructions so the 6.3 for the ECC83s are floating. If it comes to it I'll have to borrow the 'official' Hammond 274BX (or whatever it's called) from 2A3 ......

stiff upper lip laddie! It'll get a flippin' split lip if it carrys on like this for much longer :) what's happening around the 27K 3watt resistor? Just my fist threatening to bash it 'n' all of it's mates-in unless they respond to my magic words... No achally I haven't dared power it up again unti...

^^^^ Too many drivers....... 1 per channel is all thats needed

DTB

Summat daft going on here. Isolated the PSU from the cct to make sure I'm not being a donkey. Nicks Diodes in series with Anodes, 47R series resistance as per LW cct. I've rigged up a 2K dummy load (2 x 1K 50W Alu clad resistors) to load the supply into ... 1st Sovtek '34 RIP, Arc'd like a welders t...