herman

Responses from herman

SET DIY compared to Wavelength or Commercial Brand
You are correct that it is relatively easy to build an SET amp. Plans and parts are readily available. The low parts count makes them fairly simple to construct and you will probably end up with a good sounding amp saving a lot of money in the pro... 
capacitor explanation?
Aball, your description of the 2 emitter resistors is exactly what I tried so poorly to explain. We are in complete agreement. As far as variations in re prime, I also agree that current has the most profound effect. The approximate formula re = 2... 
capacitor explanation?
If anyone is still following this thread:My previous responses were based on my memory so I decided to pull out an old friend, Malvino's book on Electronic Principles that I taught about 15 years ago. Aball's mention of re prime brings back fond m... 
capacitor explanation?
Now that I've thought about a bit, I'll back off on the statement about bypass caps not adding to stability. I now see where you are coming from. I will stand by my statement that the term "coupling capacitor" is a misnomer. The purpose of the cap... 
capacitor explanation?
Aball's explanation of coupling capacitors is good. Coupling is actually a misnomer since they are actually in the circuit to block DC as he points out.Output caps are also used to block DC but the part about output caps lowering impedance is wron... 
Are Lowthers a "full range listening" speaker?
Comparing the 2 is very difficult because they are used with completely different electronics, cables, and rooms. That said, they are much more alike than different. Both full range, extremely dynamic, and just a pleasure to listen to. My Lamhorns... 
Tube myths
Your analogy is flawed.How will a doctor know someone is ill unless that person contacts the doctor for advice?If that same doctor goes onto some public forum and proclaims that they are an expert in some field of medicine, then they are advertisi... 
Are Lowthers a "full range listening" speaker?
The only experience I have are with my own Lamhorns with DX-3 Lowthers and a friend's Beauhorns with I believe, EX-4. Both systems have high quality subs. Based on this, I disagree with Ultrakaz' observation that they are not the best choice for r... 
Are Lowthers a "full range listening" speaker?
I think the short answer to your question is "no". You cannot expect a Lowther system to reproduce the lower octaves unless you have extremely large cabinets. That said, I find that coupled to a good subwoofer to handle the lower frequency extreme... 
Any recomendation fro balanced phono stage?
Do you have a budget or is it cost no object? New or used or does it matter? I hear the Boulder unit is nice if you have $20,000 or so to spend. There are very fine choices at lower price points but it is kind of fruitless to make suggestions unle... 
Tube myths
OK, let's examine the facts, no inferences or assumptions.1. Fletchj is a dealer in NOS tubes2. Fletchj posts detailed information on NOS tubes setting himself up as being knowledgeable about these tubes3. Fletchj advises us to buy only from knowl... 
Tube myths
This is a discussion forum, not a place to advertise.I do not disagree with the information you have provided regarding tubes and dealers. What I take exception to is your stance that you are doing this as service to your fellow hobbyist. When you... 
Tube myths
"My best advice, is to find a tube dealer, who is willing to stand 100%, behind his products, and knowledgeable, about the product, they are offering."Could that dealer be, Oh, I don't know, perhaps YOU!Come on, if you want to promote yourself the... 
InfiniCap Vs AuriCap
I agree that the .3 uF is no big deal, too small a cap will roll off the bottom end so in this case bigger is better. I don't necessarily agree that either will be better than the Solens. I would assume that if you can hear a difference at all, it... 
Cleaning & polishing speakers & gear
Whenever we have a very warm day here in Tennessee, I drag all of my equipment out onto the driveway and hose it down real good with my garden hose. You have to be careful to let the sun really dry it all out, but there is nothing like a good spri...