BigBusa Posted December 3, 2003 Share Posted December 3, 2003 Wow, I feel inept but I cannot be sure how the speaker wires are supposed to connect to the 340B I just got back from Craigs shop. On the backside there's left "H" & "O", center h & o and right h & o. Then There is 4, 8 and 16ohms. Then theres the same on the top side. WTF?! I can't tell which is positive and which is negative. I don't wanna fry this thing. Quote Link to comment Share on other sites More sharing options...
BigBusa Posted December 3, 2003 Author Share Posted December 3, 2003 dohh ...thanks for the call craig!!! so fast too!!! Off to hear the angels fly from my khorns .... Ahhhhhhhh! Quote Link to comment Share on other sites More sharing options...
ben. Posted December 3, 2003 Share Posted December 3, 2003 Copied from an earlier post: ----------------- Instead of using the "H" and "O" speaker screws, connect your negative speaker lead to the "O" , and your positive speaker lead to the impedance screw (4, 8, 16 ohm) that most closely matches the impedance of your speaker. By doing this, you bypass the phase switch, and your speakers are directly connected to the output transformer secondary. ----------------- Doing this will bypass the phase reversal switch, which adds a mess of wire to the signal path. I use the 8 ohm tap. Many others prefer the 4 ohm tap (especially Mc owners, seems like...) I found the 8 ohm connection subjectively a bit more dynamic, perhaps less constrained? Quote Link to comment Share on other sites More sharing options...
BigBusa Posted December 3, 2003 Author Share Posted December 3, 2003 hmmmmm ...I'm not sure but I'm either doing something wrong or one channel has no output. Here's what I've got. The right speaker has power when connected to the center h & o as shown but nothing when connected to the right H & O. However, the balance works properly when hooked up this way. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted December 3, 2003 Share Posted December 3, 2003 Unhook from the center two terminals and hook to the H and O on the left !! You have one hooked to the powered center channel. Craig Quote Link to comment Share on other sites More sharing options...
T2K Posted December 3, 2003 Share Posted December 3, 2003 And put some spades on that cheap speaker wire!!! Keith Quote Link to comment Share on other sites More sharing options...
Allan Songer Posted December 3, 2003 Share Posted December 3, 2003 Bare wire is better than spades with these old connectors. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted December 3, 2003 Share Posted December 3, 2003 yea actually Allan is correct but bare wire is a pain and you have to be careful not to have it hangin off and shorting the signal out. Quote Link to comment Share on other sites More sharing options...
BigBusa Posted December 3, 2003 Author Share Posted December 3, 2003 Craig, you were right ...it was the phase switch on the back. Thanks for the fantastic support (craig called me at home ...twice!). It's fine now. Sounds great. Will have more time to play around with it tomorrow. I'm not a big fan of these speaker wire attachments. I have 12 ga monster cable to my 4 speakers but it's just to big to connect to these little screws. Quote Link to comment Share on other sites More sharing options...
tillmbil Posted December 3, 2003 Share Posted December 3, 2003 Hey Craig, Are you saying the center channel is powered? I sent it to a powered sub and it sounds OK. But I hate taking power away from my front speakers, can you explain please? Do I need to do something else to hook up a powered sub? Quote Link to comment Share on other sites More sharing options...
garymd Posted December 3, 2003 Share Posted December 3, 2003 Bill, The 299 a and b have unpowered centers (needs an amp or powered sub). The 299d is powered. Not sure about the 299c. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted December 3, 2003 Share Posted December 3, 2003 Gary is right. The 299D, LK72B, 222D LK48B and 340B all have both powered and unpowered hookup for the center channel. Most all of the others have just unpowered center channel outputs. Quote Link to comment Share on other sites More sharing options...
JCturboT Posted December 3, 2003 Share Posted December 3, 2003 ---------------- On 12/3/2003 9:28:53 PM BigBusa wrote: I'm not a big fan of these speaker wire attachments. I have 12 ga monster cable to my 4 speakers but it's just to big to connect to these little screws. ---------------- I've mentioned these a couple times but I'll mention it again... These are available from partsexpress.com part #095-820. They sell for $2.90 a 5 pack and fit 12 guage wire without a problem.Their #6 hole size fit both my Scott LK-48 as well as my Eico HF-81. Actually, they are great for any older tube amp that is speaker connection "challanged". Jeff Quote Link to comment Share on other sites More sharing options...
T2K Posted December 4, 2003 Share Posted December 4, 2003 I use those Jeff and they work just lovely. Evidently even Scott thought it wise as they used them originally. Those ratty wire ends will get you if you're not really careful. Keith Quote Link to comment Share on other sites More sharing options...
tillmbil Posted December 4, 2003 Share Posted December 4, 2003 Hey Craig, which model did I have? It was supposed to be a 299C. As I recall there was only on location for the center channel hookup through speakers wires on my Scott. I thought it had to be RCA's to be non-powered. Quote Link to comment Share on other sites More sharing options...
sheltie dave Posted December 4, 2003 Share Posted December 4, 2003 Jeff, thanks for the spades reference! They are exactly what I need so I won't be using any more *&^%$$#@! when I try to hook up speakers. It is interesting that the creature comforts we demand on equipment today were not present fourty years ago, and we look at this earlier era of electronics as less advanced. If you reflect on this for a minute, many of the amps and pre's we have were hand built as weekend projects by our parents and grandparents. THEIR paradigm was what can we afford, and how much can we buy if we build the sucker from a box of parts. One of my goals in the next year is to buy and build a good tube preamp so I can learn more about theory and operation of these voodoo boxes. I think that much of what we have and where we are in the world has been reached because we stand on the shoulders of giants, and I hope that we can wisely steward these gains. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted December 4, 2003 Share Posted December 4, 2003 I think yours was a 299D in disguise it has a power center channel ! If the output tubes are behind the transformers then its a 299D with powered center channel ! Craig Quote Link to comment Share on other sites More sharing options...
tillmbil Posted December 4, 2003 Share Posted December 4, 2003 Craig, in running a powered sub woofer should a purchase some filter between the sub and the amp? I know they do that for car stereo when you add an amp to a factory stereo. Quote Link to comment Share on other sites More sharing options...
Allan Songer Posted December 4, 2003 Share Posted December 4, 2003 If you tin the bare wire you eliminate 98% of the hassle. I used tinned bare wire on both my Fisher 500C and SA-100 with zero problems--I used silver solder. On the MC-30's I had Nordost install gold plated mini-spades at the factory because there was no up-charge. They work just fine as well . . . Quote Link to comment Share on other sites More sharing options...
AnalOg Posted December 4, 2003 Share Posted December 4, 2003 ---------------- On 12/4/2003 8:05:22 AM sheltie dave wrote: Jeff, thanks for the spades reference! They are exactly what I need so I won't be using any more *&^%$$#@! when I try to hook up speakers. It is interesting that the creature comforts we demand on equipment today were not present fourty years ago, and we look at this earlier era of electronics as less advanced. If you reflect on this for a minute, many of the amps and pre's we have were hand built as weekend projects by our parents and grandparents. THEIR paradigm was what can we afford, and how much can we buy if we build the sucker from a box of parts. One of my goals in the next year is to buy and build a good tube preamp so I can learn more about theory and operation of these voodoo boxes. I think that much of what we have and where we are in the world has been reached because we stand on the shoulders of giants, and I hope that we can wisely steward these gains. ---------------- Dave, Give a Foreplay from Bottlehead a try. It was a fun project last year, and sounds damn good for a kit. Tom Quote Link to comment Share on other sites More sharing options...
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