jose

Thanks! I have had many problems due to the pre-valves. so I changed some ECC81/CV4024 quads... but now it´s work OK.

Add my boards. A friend of me is interested on SMD boards but depend on price. Can I increase my order when we know the price? Add

At the moment and once removed the hum noise (coming from the pre-valves ), I have not noticed that the ampli makes noises or strange things. I'm listening Bach,(Goldberg Variations/Glenn Gould) Thanks for your help guys

Thanks I´m interested in Unbal/Bal, diamond buffer and maybe others too.

I´m sure that my Hum problem is a wiring issue. This is not annoying but I know it is there. On the other hand, is tricky have so many wire in a little space but now I´m working on this part. For cleaning pins I'm thinking about use isopropyl alcohol and a aluminum wool.

Thanks MLA. No problem Jim. I'll use the 10M90 for a time... until I start mounting the amp boxes I guess.

Thanks MLA. I had knew this good article I´m working on the ground wires and inputs and I think that I have controlled !!!! I had at the input (unbalanced/rca) and a wire between G and cool channels conect and I started again the verifications. My surprise is that now (with the inputs connected) I have managed to adjust the voltage between plates perfectly and the voltage between plates and ground without problems. The latter is quite misleading. Problems with the ground? The sound is nice... I'm listening "Don Giovanni" now perfectly but I can hear a weak hum without music and with a complete silence on the room. I need to simplify the wiring of the temporary assembly to find out what's going on.

Thanks for your comments. I use two trafos, one of them with the BH PSU (+ -355 volt and -15 volt) and for the heaters I use 12.6v @ 5Amp / 6.3v @ 5Amp. For the ECC81 I have a 2 Ohm resistor before (for getting off a bit the voltage). So I can try it again without this resistor.

OK, I´m bit frustrated. I can't match the ecc81 on 0 volt during much time. My amp pass all steps and volts are correct, including offset and balanced. I have a strong noise on both channels like hum and when I apply 2 volt on the input I have distorsion on both channels too. So I don´t know what can I do. I´m using 3 ECC81 quad and I have the same result.

Today my amp passed all checkpoints so I think that this weekend I can listen music. I had problems with my first ECC81 quad (JJ´s new stock ) and I couldn´t have a good balance between plates (50~120 volt). I was crazy looking some problem (bad solder or wrong values) but everything was OK and I had good values on the rest of checkpoints Today I changed this quad for a new quad matched (NOS CV4024) and I read 0~4 volt (drift a bit) between plates without moving trimpot of mid-point Thanks to JimL and mwl168 for his patience.

yes? is a nice bike. Titanium or aluminum? I´m very happy too with my dura ace. Only loses around 60 grs if you compare with the Ultegra crankset but the dura ace look is IMO very beautiful. On my bike

I love the shimano dura ace 9000 crankset

EL34? Is not the 6S4A better choice? Sorry I´m mistake

Thanks Pars. 28?. Is not it too wide for the road?

I just buy another 3eas of GP4000 S II for 94€ with shipping and taxes

Today 3500 kms with the Continental GP 4000 SII; Rear tyre around mid use (according to the wear marks), some little cuts and a big hole (around 2 mm) on a side. Very dangerous, you can see the canvas inside. I have replace this for a new GP 4000 SII (yesterday) Front tire around mid use too (according to the wear marks). Some little cuts and some wear symptom but nothing special. I think that I can use this others 500/1000 kms. In total, two "flat tire" on 6 months. I think that the Michelin Pro 4 SC has a bit more grip than the GP 4000 SII (on dry) and is more faster EMO when the tire is new. With wet asphalt, I feel more secure with the GP4000 SII (more grip and very progressive, advise when it reaches its limit ) but the front tyre raises a curtain of wáter in front of your face.. This is a little uncomfortable for the vision but nothing serious. Michelin Pro4 SC on wet tends to lose grip without warning. You have all grip or nothing. They suffered a total wear with only 3200kms and three "flat tire". Last year I used 2 pair. Them I change the rear for a Lithium 2 and a Pro4 SC front. ...And of course, 25 better than 23. sorry for my English

On vinyl

I would like but no, I only know about some classic models and the Y22 is one them. The Y22 is not a new design and haven´t the same performance but I think that in his time, the Y22 was a radical bike. About classical bike, I'm searching a road bike (aluminum) of the 80. I need one for training on the "roller". I would like a Bianchi (Pantani is one of my idols) but really I haven´t any preference

About Spin wheels. Someone remember the Trek Y-22?

... only for little profesionals

My son's bike

Is a nice Price. In Probikeshop; 29,90€/ea 700x25 and 28,90€ 700x23 http://www.probikeshop.es/cubierta-continental-grand-prix-4000-s-ii-700x25c-flexible/93000.html

Someone else has used dropper seatpost? I'll try this a couple more weeks and if I like it I'll buy a RS Reverb

My old MTB... A friend of mine has lent me his cheap dropper seatpost (a Tmars but I don´t know the model) and I´m triying this now that I'm resting. It seems to me that taking technique is a great success as walking down very broken paths... Because you can move your ass around the bike and change your gravity point.

Thanks Jim