Esmond: Are the wipers on the switch contacts still sufficiently springy to ensure a good connection? I replaced the entire switch-bank in one unit that showed...
The place I used to find these was the local (university) engineering library - bound set for each year and complete with indexes. Some libraries made a habit...
Thanks for all the assistance with this. In the end I came to suspect 100 ohms worth of goo. There was no other plausible explanation. The pin concerned was on...
WD40 is pretty useful as a solvent cleaner and penetrative lubricant but I'd suggest caution with electronics. It can leave residues, an oily sludge and...
Hi, The boards in the Ebay 350029452409 offering are "based on" the 405, not replacement boards. The dimensions as well as the electrical specs are different. ...
I had a leak to ground via the foremost pin of the CANCEL switch, which caused one channel to be substantially weaker. I resoldered the pin. Although it is not...
Hot air guns are fine for surface mount ICs if with the right techniques on modern circuit boards but not vintage boards and components IMHO. I'd clear each...
As you may remember, I have produced my first passive pre-amp, along with much swearing and burning of fingers. Well,, I followed Lee's advice and turned it...
That dreaded question, what interconnect do I use? I have a solid silver 4 pin din between my passive pre-amp (see my previous post) and my quad 303, which I...
There's much dispute about interconnects but given that you might hear differences between cables, you'd be less likely to assess improvements until you ...
Thanks Fred for your reply. I think the problem is that, like most hi-fi-istas, I should imagine my hardware mods will be an ongoing thing. I've swapped my...
Tony, I really do not think radio quality is a basis for judging audio interconnects. Causes of reception variations are a subject worth researching and it's...
Whilst on the subject of cables - I'd like to remind you not to forget the aerial cable too! I've been using mid-market audio and mains cables for almost 10...
Have a browse around a site run by Martin Pickering. A no-nonsense guy and very free with information that although satellite / freeview related may be of ...
I just picked up a Denon PRA-1500 Pre-Amp that has unbalanced inputs and outputs as well as balanced outputs. I am wondering if I can modify my 405 to accept...
I don't know the science behind it though I can say that when I swapped my aerial cable to IXOS 105 custom one the sound stage got deeper, I got less noise and...
Well certainly when we had a new TV Aerial put up after some windy weeather, I took the opportunity of renewing the wiring to our existng Radio aerial (5...
... Well, it turns out that there are measurable differences but they are easily quantified, i.e. there is nothing magic in "magic" cable. There are three...
Now THIS is better than silly claims about magical cables. ... Fred. ... ___________________________________________________________ Yahoo! For Good helps you...
I've been waiting for the cable that can clean up the zero crossing-points of a VHF-FM signal so it sounds better in my tuner. Widens the sound stage, all that...
Hi, I was listening last night and suddenly one channel went quiet. Checked my Quad II notice one of them was off. Checked the main fuse, looks like it is...
I got my dads old Quad 303 amp out the loft and tannoy speakers to set up in my room because I am using a cheap HiFi and speakers that are OK but I wanted...
Hi Pete I have had Quad amps for more than 30 years, when the 405 first came out (about 1976) I bought one new. Hated it, my 303 and valve Quad II were vastly...
Hi Ben That problem in the GZ32 could be caused by a failed power supply capacitor in the Quad II. I had a similar episode a few weks ago. One needs to be very...
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