3dzapper Posted October 9, 2004 Share Posted October 9, 2004 That's better! Rick Quote Link to comment Share on other sites More sharing options...
Audio Flynn Posted October 9, 2004 Share Posted October 9, 2004 I have to give the Jolida amps a bit more of a listen. Shape Shifters CD was so cool there has to be a little bit of musical prowess in their amps. Quote Link to comment Share on other sites More sharing options...
sheltie dave Posted October 10, 2004 Share Posted October 10, 2004 Fini, I got the ST70 back from Mike in perfect order(chalk one for the good to UPS.) The hum in your Fisher could be from a cap or a transformer, but it probably wouldn't be a good idea to use the Fisher preamp side with an amp- kinda skating on thin ice. If you want, I could repack the Dynaco and turf it out to you along with either a Creek passive preamp(with only a single line stereo input...no turntable) or a '70s Nakamichi 420 SS preamp. Both preamps are solid and would not embarrass the wife when she has a tea. Just send the preamp back when you locate one that follows you home As Mark noted, it is a slippery slope trying to drag vintage iron up the repair hill. I don't think you'll have worries with this one, and it has a good cage so you won't have to curtail playing hai alai in your library... Quote Link to comment Share on other sites More sharing options...
mike stehr Posted October 10, 2004 Share Posted October 10, 2004 No thanks to the Fedex lady here. I kept telling her: "Make sure you get the address right." "Uh, Ok..." And she still wrote 520 instead of 530. Any of those 6DJ8's work? Quote Link to comment Share on other sites More sharing options...
sheltie dave Posted October 10, 2004 Share Posted October 10, 2004 Mike, Thom is stopping by in a few days with his Hickok tester. I don't think the Bugles lost anything in the Carver, but we'll see. I "scored" a quad of NOS NIB GEC KT88s yesterday, brought them home, and they are all dead Liam is feeling much better, though Quote Link to comment Share on other sites More sharing options...
fini Posted October 10, 2004 Author Share Posted October 10, 2004 * Quote Link to comment Share on other sites More sharing options...
NOSValves Posted October 10, 2004 Share Posted October 10, 2004 Yup !I can hook terribly noisy amps up to my satilite speakers and not hear a thing but on the lascalas it's easily heard. Hum that is unaffected by the volume control is most likely the power supply. Craig Quote Link to comment Share on other sites More sharing options...
fini Posted October 10, 2004 Author Share Posted October 10, 2004 + Quote Link to comment Share on other sites More sharing options...
3dzapper Posted October 10, 2004 Share Posted October 10, 2004 ---------------- On 10/10/2004 4:32:07 PM fini wrote: Tell me we're not talkin' bad trannies... ---------------- I hate bad trannies too! But in your case it's probably a capacitor. Rick Quote Link to comment Share on other sites More sharing options...
fini Posted October 10, 2004 Author Share Posted October 10, 2004 = Quote Link to comment Share on other sites More sharing options...
NOSValves Posted October 10, 2004 Share Posted October 10, 2004 Fini, It's not that simple I'm afraid. The hum can be fairly easy to find with a scope. That is if were really talking hum. Does the noise come out of the woofer only ? Craig Quote Link to comment Share on other sites More sharing options...
Frank Speaker Posted October 10, 2004 Share Posted October 10, 2004 I really see no problem here. Alls you need to do is polish up that big chunk of metal in the middle there and you should be all set. Quote Link to comment Share on other sites More sharing options...
fini Posted October 10, 2004 Author Share Posted October 10, 2004 ~ Quote Link to comment Share on other sites More sharing options...
fini Posted October 10, 2004 Author Share Posted October 10, 2004 " Quote Link to comment Share on other sites More sharing options...
Frank Speaker Posted October 10, 2004 Share Posted October 10, 2004 Thats because you know sh!t from shinola. Quote Link to comment Share on other sites More sharing options...
fini Posted October 10, 2004 Author Share Posted October 10, 2004 # Quote Link to comment Share on other sites More sharing options...
Klipschfoot Posted October 10, 2004 Share Posted October 10, 2004 fini, I am no expert, but that Fisher will give you good sound and will also clean up your rack. (No jokes here, okay?) I have an 800-B and, from what I have read, your 500 is a comparable unit. The reason the ST-70 is modded, is because it NEEDS to be modded. The bass of the ST-70 in stock condition is flat, boring, dead, dull, made for 50 year-old speakers. The Fisher will give you a terrific tuner as well as a terrific amp just with some upgrades. No circuit REPLACEMENTS, as is often the case on modified ST-70's. I don't even think the ST-70 looks that great. I had one. I also sold one. I am working my inventory down and the Fishers are staying. It's kind of like Volvo owners can't afford a Mercedes. i.e., I can't afford McIntosh. Quote Link to comment Share on other sites More sharing options...
Thoriated_Tiger Posted October 11, 2004 Share Posted October 11, 2004 With all due respect, Klipschfoot, I beg to differ. The 70 when brought back to specs has a bottomless pit for bass. Fast, bouncy, deep, well-controlled, well-defined bass. Just brought back to specs, mind you, not modified beyond recognition. Care to venture a guess as to why a 40 year old stock, un-restored 70 has no bass? By your logic, then a MkII should have flat, dull bass, and so should a McIntosh MC30, and even a Fisher 500. After all, *ALL* speakers of the era were bass-deficient, right? Someone forgot to tell PWK that, someone forgot to tell JB Lansing that. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted October 11, 2004 Share Posted October 11, 2004 Tiger, Actually if you used the cap board your ST70 is not back to factory spec. The cap boards at least double the value of filtering at every step. Well I guess you could of used smaller value caps then they supply with the kits. Craig Quote Link to comment Share on other sites More sharing options...
Thoriated_Tiger Posted October 11, 2004 Share Posted October 11, 2004 Yeah, I know. But at least it's not a bastardized hack, and still uses the original ckt. The bass came back bigtime with a fresh can cap, but a little problem remained -- when running near full throttle, the most extreme low end would flutter. (Flutter is the best i can come up with.) Funny thing is, after I did all that I ran across a review from High Fidelity, 1959, where they graph the same exact thing -- at full throttle, from 20 to about 30hz it dips. It was indeed very thin on the psu from Day One. Mind you, that's at 35 watts. Then again, I was testing into really in-efficient speakers, on purpose, to see the limits. The cap upgrade removed that flutter. If you full-throttle a 70 into Klipsches, you'll likely get blown into the back wall.. It just irks me that so many folks (it's not bad here, but in AA it's way bad) think the 70's bass-light.. it ain't. That can cap goes flat a lot faster than whatever McIntosh and other builders of higher-priced gear used. That flat can-cap is what gives it its tired, flat, flabby, thuddy sound... once it's replaced, the amp is no longer a warm, cuddly, gentle amp -- it has fangs. I wrote a review on AA about the 70 after restoration to enlighten those who parrot other's opinions / experiences without actually restoring one themselves. The board I use keeps the section just after the 5AR4 near-stock (60uf, I think? Maybe even 30) but just about triples everything after the choke. The diff between a flat can and a new can was night-and-day. The diff between the new can-cap and the sds board was oh so much subtler.. but appreciated. Quote Link to comment Share on other sites More sharing options...
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