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Who Calibrates Bird Slugs?
I have a 2,500 watt, HF slug that I don't have confidence in. Anyone
know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW |
Who Calibrates Bird Slugs?
wrote in message
oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW Have you contacted Bird? Last I heard, they were still making equipment. As to "reasonable" - thats a good question. But then at least you would know it is "accurate". L. |
Who Calibrates Bird Slugs?
L. wrote:
wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW Have you contacted Bird? Last I heard, they were still making equipment. As to "reasonable" - thats a good question. But then at least you would know it is "accurate". L. Yes, Bird is still in business and, no (IMHO), they are not reasonable... |
Who Calibrates Bird Slugs?
"Carter-k8vt" wrote in message
. .. L. wrote: wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW Have you contacted Bird? Last I heard, they were still making equipment. As to "reasonable" - thats a good question. But then at least you would know it is "accurate". L. Yes, Bird is still in business and, no (IMHO), they are not reasonable... As you seen, I questioned "reasonable". I guess a good question may be - ARE they the only game in town to do such calibrations? There are a few places who do "Service Monitor" calibrations and such. I wonder if "they" would/could do them? Now, I too am interested to see if anyone has any knowledge of doing such thing - the procedure, equipment used, etc. IF it is something I can do with my own - then by all means, I'll do it. I've got a decently equipped bench. L. |
Who Calibrates Bird Slugs?
Ok guys here is what you need to cal a Bird
Youb need a Fluke Model 5100B Calibrator, About $2,695.00 on ebay you will also need a D-c input 4381-050 Element about $275-$300 new That goes in place of the element on the Bird meter ( has a BNC on it) 10 milli amps--------10 watts 20 milli amps---------middle scale 30 milli amps----------full scaleand thats how you cal a bird watt meter Karl N2RLD On Wed, 13 Sep 2006 19:03:31 -0400, "L." wrote: "Carter-k8vt" wrote in message ... L. wrote: wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW Have you contacted Bird? Last I heard, they were still making equipment. As to "reasonable" - thats a good question. But then at least you would know it is "accurate". L. Yes, Bird is still in business and, no (IMHO), they are not reasonable... As you seen, I questioned "reasonable". I guess a good question may be - ARE they the only game in town to do such calibrations? There are a few places who do "Service Monitor" calibrations and such. I wonder if "they" would/could do them? Now, I too am interested to see if anyone has any knowledge of doing such thing - the procedure, equipment used, etc. IF it is something I can do with my own - then by all means, I'll do it. I've got a decently equipped bench. L. |
Who Calibrates Bird Slugs?
OK - lets see here. First of all, thanks for the "Bird Wattmeter"
calibration info. I appreciate it as I'm sure others may as well. However, the question was of calibrating a(n) "element/slug". So, can you enlighten us on that aspect - or is it that they're either go /no go - and it is the "meter" which is all that is calibrated? L. "Karl" wrote in message ... Ok guys here is what you need to cal a Bird Youb need a Fluke Model 5100B Calibrator, About $2,695.00 on ebay you will also need a D-c input 4381-050 Element about $275-$300 new That goes in place of the element on the Bird meter ( has a BNC on it) 10 milli amps--------10 watts 20 milli amps---------middle scale 30 milli amps----------full scaleand thats how you cal a bird watt meter Karl N2RLD On Wed, 13 Sep 2006 19:03:31 -0400, "L." wrote: "Carter-k8vt" wrote in message t... L. wrote: wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW Have you contacted Bird? Last I heard, they were still making equipment. As to "reasonable" - thats a good question. But then at least you would know it is "accurate". L. Yes, Bird is still in business and, no (IMHO), they are not reasonable... As you seen, I questioned "reasonable". I guess a good question may be - ARE they the only game in town to do such calibrations? There are a few places who do "Service Monitor" calibrations and such. I wonder if "they" would/could do them? Now, I too am interested to see if anyone has any knowledge of doing such thing - the procedure, equipment used, etc. IF it is something I can do with my own - then by all means, I'll do it. I've got a decently equipped bench. L. |
Who Calibrates Bird Slugs?
Yes, the slugs can be calibrated. Plate on slug is removed, then the slug
is calibrated. Important thing is to have an accurate standard to calibrate to. Known 50 ohms with an accurate reading of voltage in the center of the frequency range is a good start. Colin K7FM |
Who Calibrates Bird Slugs?
Heck best thing can do, is find someone else with
a wattmeter, and then compare the measurement, vs. your slug/wattmeter. If within +- 5 % don't worry! You wouldn't even hear the diff at 10 %!, but if memory serves, these are susposed to be accurate to 5%.. Jim NN7K L. wrote: wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW Have you contacted Bird? Last I heard, they were still making equipment. As to "reasonable" - thats a good question. But then at least you would know it is "accurate". L. |
Who Calibrates Bird Slugs?
P.S. IF you are really desperate, either remove
the silver cover, or drill a hole , about dead center, in the (Power. Letter, as in ,where,say 1000 C, in the rectangular box),Just the aluminium plate, NOT any deeper!).This about 6 o'clock position. There is a calibration pot accessable thru an access hole in the slug, and can be adjusted- BUT I highly recommend against it! Jim NN7K Jim - NN7K wrote: Heck best thing can do, is find someone else with a wattmeter, and then compare the measurement, vs. your slug/wattmeter. If within +- 5 % don't worry! You wouldn't even hear the diff at 10 %!, but if memory serves, these are susposed to be accurate to 5%.. Jim NN7K L. wrote: wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW Have you contacted Bird? Last I heard, they were still making equipment. As to "reasonable" - thats a good question. But then at least you would know it is "accurate". L. |
Who Calibrates Bird Slugs?
Thanks guys and girls! Some good ideas. I hope the OP is following too.
L. "Jim - NN7K" wrote in message ... P.S. IF you are really desperate, either remove the silver cover, or drill a hole , about dead center, in the (Power. Letter, as in ,where,say 1000 C, in the rectangular box),Just the aluminium plate, NOT any deeper!).This about 6 o'clock position. There is a calibration pot accessable thru an access hole in the slug, and can be adjusted- BUT I highly recommend against it! Jim NN7K Jim - NN7K wrote: Heck best thing can do, is find someone else with a wattmeter, and then compare the measurement, vs. your slug/wattmeter. If within +- 5 % don't worry! You wouldn't even hear the diff at 10 %!, but if memory serves, these are susposed to be accurate to 5%.. Jim NN7K L. wrote: wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW Have you contacted Bird? Last I heard, they were still making equipment. As to "reasonable" - thats a good question. But then at least you would know it is "accurate". L. |
Who Calibrates Bird Slugs?
Now, I too am interested to see if anyone has any knowledge of doing such thing - the procedure, equipment used, etc. IF it is something I can do with my own - then by all means, I'll do it. I've got a decently equipped bench. IF - you have an accurate standard available to compare your Bird Wattmeter against, then I see no reason you can not do a calibration on your Bird Wattmeter Slug yourself. The information you need is readily available.... in fact QST, September 2006 issue, page 49, provides enough information for most hams to figure out how to calibrate their Bird Meter's slug. The article actually allows some rather neat features, too, if you are "slug" poor. Ed K7AAT |
Who Calibrates Bird Slugs?
"Ed" wrote in message
. 192.196... Now, I too am interested to see if anyone has any knowledge of doing such thing - the procedure, equipment used, etc. IF it is something I can do with my own - then by all means, I'll do it. I've got a decently equipped bench. IF - you have an accurate standard available to compare your Bird Wattmeter against, then I see no reason you can not do a calibration on your Bird Wattmeter Slug yourself. The information you need is readily available.... in fact QST, September 2006 issue, page 49, provides enough information for most hams to figure out how to calibrate their Bird Meter's slug. The article actually allows some rather neat features, too, if you are "slug" poor. Ed K7AAT Damned, I'll have to see if my friend still gets QST. I don't. Thanks! L. |
Who Calibrates Bird Slugs?
Bird is still in business in Solon, Ohio.
And Coaxial Dynamics, just up the road from Bird, who also makes slugs that will fit the old 43, will calibrate Bird slugs. wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW |
Who Calibrates Bird Slugs?
"EchoBlip" wrote in message
.. . Bird is still in business in Solon, Ohio. And Coaxial Dynamics, just up the road from Bird, who also makes slugs that will fit the old 43, will calibrate Bird slugs. wrote in message oups.com... I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW While we didn't get a "price" from Bird to calibrate - another poster suggested they weren't "reasonable". I wonder if you might have any experience - price wise - with Coaxial Dynamics? Or perhaps able to do a side by side price comparison - from past experiences? L. |
Who Calibrates Bird Slugs?
Using the technique practiced in the National HRO, you can simply make a
calibration chart for each particular slug. That makes it useful over a much wider frequency than it is marked. The directivity remains even though the slug is used "off frequency". It does not matter what the power reads on the meter - if you know by a calibration chart what the actual power is. Colin K7FM |
Who Calibrates Bird Slugs?
Yes, there is some good information floating around. However, it all
boils down to, in your words, having an accurate standard available. I do not. Another poster essentially suggested "close is good enough" - match the slug against some other meter reading. I understand that reasoning, and for the most part that's fine. However, I didn't buy a Bird to calibrate against my MFJ. I want to know power out (+/- Bird tolerance), not just estimate it. I bet I have a dozen or more wattmeters, but I only have one Bird 43, and I want it to be within spec. It's starting to look like I should just borrow someone else's 2,500 watt slug known to be accurate, and then just adjust the pot in mine to match! Anyone want to lend me theirs? ;-) Ed wrote: Now, I too am interested to see if anyone has any knowledge of doing such thing - the procedure, equipment used, etc. IF it is something I can do with my own - then by all means, I'll do it. I've got a decently equipped bench. IF - you have an accurate standard available to compare your Bird Wattmeter against, then I see no reason you can not do a calibration on your Bird Wattmeter Slug yourself. The information you need is readily available.... in fact QST, September 2006 issue, page 49, provides enough information for most hams to figure out how to calibrate their Bird Meter's slug. The article actually allows some rather neat features, too, if you are "slug" poor. Ed K7AAT |
Who Calibrates Bird Slugs?
"Yes, there is some good information floating around. However, it all
boils down to, in your words, having an accurate standard available. I do not." This is what ham radio is all about. We make do without adequate test equipment - we just need to put a little more effort into figuring how to use what we have. Take a dummy load. Use a dvm to measure the dc resistance. That should also be the rf impedance. You can determine power going into the load by measuring the rf voltage across it. Some of the surplus voltmeters will measure rf voltage. Or, borrow one. Knowing the rf voltage across 50 ohms, you can calculate power. P= e squared / R. It is likely that the linearity of the Bird is ok, even if the power reading is incorrect. So, once you check the accuracy at one point, you have it for all points. Colin K7FM |
Who Calibrates Bird Slugs?
"COLIN LAMB" wrote in message
link.net... "Yes, there is some good information floating around. However, it all boils down to, in your words, having an accurate standard available. I do not." This is what ham radio is all about. We make do without adequate test equipment - we just need to put a little more effort into figuring how to use what we have. Take a dummy load. Use a dvm to measure the dc resistance. That should also be the rf impedance. You can determine power going into the load by measuring the rf voltage across it. Some of the surplus voltmeters will measure rf voltage. Or, borrow one. Knowing the rf voltage across 50 ohms, you can calculate power. P= e squared / R. It is likely that the linearity of the Bird is ok, even if the power reading is incorrect. So, once you check the accuracy at one point, you have it for all points. Colin K7FM Exactly...... I have a bird, and am interested in it's upkeep. However - prior to the bird - I had an occasion sometime before - when I had a 2 way radio come in - my wattmeter then had decided to flake out on me. So, I used an RF probe with an Eico 232 across the dummy load which was 52 ohms. I was able to get by with that til I could get a wattmeter going again. Ya just have to learn to adapt. AND for the hell of it, I did some comparisons from the Wattmeter to the Eico with the RF Probe. WE're talking maybe a quarter watt - or less. No big deal in most cases unless you're dealing with "low" power. At least the 2 way radio was back on the air! L. L. |
Who Calibrates Bird Slugs?
Thank you for telling me what ham radio is all about. 41 years of
ignorance now cured. And I also deeply appreciate your pointing out my lack of effort figuring out how to use what I have. What a slackard I have been. I'll try to mend my ways. Finally, thank you so much for restating Ohm's law - I'll attempt to better understand it. Ok, let's cut to the chase here, OM ... first, if I wanted to "make do" I wouldn't have bothered to post my question, let alone invest in a Bird. Not all of us lie down and just "make do". I really don't need you to tell me how to set / lower my standards. And secondly, if I'm questioning the accuracy of a Bird slug, why on earth would I want to now rely on the accuracy of some "DVM" or "surplus voltmeter" at the kilovolt level? It simply doesn't make sense. Perhaps I am over-reacting, but your attitude is clearly condescending: all I asked was if anyone knew where I might get a slug recalibrated. I really didn't ask what you thought ham radio is all about, nor for you to judge my level of effort. COLIN LAMB wrote: "Yes, there is some good information floating around. However, it all boils down to, in your words, having an accurate standard available. I do not." This is what ham radio is all about. We make do without adequate test equipment - we just need to put a little more effort into figuring how to use what we have. Take a dummy load. Use a dvm to measure the dc resistance. That should also be the rf impedance. You can determine power going into the load by measuring the rf voltage across it. Some of the surplus voltmeters will measure rf voltage. Or, borrow one. Knowing the rf voltage across 50 ohms, you can calculate power. P= e squared / R. It is likely that the linearity of the Bird is ok, even if the power reading is incorrect. So, once you check the accuracy at one point, you have it for all points. Colin K7FM |
Who Calibrates Bird Slugs?
Well, I was trying to be helpful. Instead, I am condescending.
I have been a ham longer than 41 years, and I learn things all the time. Sometimes, I forget simple ways to do things. The Bird is not a model of accuracy. Accuracy is specified as a % of full scale. I do not have my books handy, but I recall it is 5% of full scale. If my recollection of 5% is correct, that means that it could be off (oh, oh, here is simple math) 125 watts at full scale or 125 watts when you are reading 500 watts. Using another Bird is not a good method of setting the accuracy. You have to use the dvm to check out the dummy load, anyway. If the dummy load is off in resistance, the Bird wattmeter will not read correctly - since it is assuming that the load is 50 ohms. I have checked dvms and found even the cheap ones are quite accurate - much higher than the accuracy specified for the Bird. I have also check dummy loads and found they are often off. A friend asked me to come over because he was measuring 3200 watts out of his amplifier and thought it was high. It was - the dummy load was also high. If you are interested in an accurate reading slug, then calibrating it against another Bird slug does not make much sense - since that might be inaccurate. Forget the surplus rf voltmeter and simply measure the heat rise of the dummy load. That will be an exact measurement of the power going in and yield much more accurate readings than the Bird. It will simply take a thermometer and a bit of math. I will not detail how to do it, because that might be condescending. I have a number of Bird wattmeters and slugs. I use them for quick and crude measurements - because they are handy. Before I could afford the Birds, I designed and built my own - and calibrated them. In fact, I wrote an article for QST in 1973 on how to build your own using ordinary plumbing parts. They were hand calibrated and as accurate as any Bird meter. If, you want your meter to be calibrated like Bird would do it, send it to them. Colin K7FM |
Who Calibrates Bird Slugs?
"COLIN LAMB" wrote in message
hlink.net... Well, I was trying to be helpful. Instead, I am condescending. I have been a ham longer than 41 years, and I learn things all the time. Sometimes, I forget simple ways to do things. The Bird is not a model of accuracy. Accuracy is specified as a % of full scale. I do not have my books handy, but I recall it is 5% of full scale. If my recollection of 5% is correct, that means that it could be off (oh, oh, here is simple math) 125 watts at full scale or 125 watts when you are reading 500 watts. Using another Bird is not a good method of setting the accuracy. You have to use the dvm to check out the dummy load, anyway. If the dummy load is off in resistance, the Bird wattmeter will not read correctly - since it is assuming that the load is 50 ohms. I have checked dvms and found even the cheap ones are quite accurate - much higher than the accuracy specified for the Bird. I have also check dummy loads and found they are often off. A friend asked me to come over because he was measuring 3200 watts out of his amplifier and thought it was high. It was - the dummy load was also high. If you are interested in an accurate reading slug, then calibrating it against another Bird slug does not make much sense - since that might be inaccurate. Forget the surplus rf voltmeter and simply measure the heat rise of the dummy load. That will be an exact measurement of the power going in and yield much more accurate readings than the Bird. It will simply take a thermometer and a bit of math. I will not detail how to do it, because that might be condescending. I have a number of Bird wattmeters and slugs. I use them for quick and crude measurements - because they are handy. Before I could afford the Birds, I designed and built my own - and calibrated them. In fact, I wrote an article for QST in 1973 on how to build your own using ordinary plumbing parts. They were hand calibrated and as accurate as any Bird meter. If, you want your meter to be calibrated like Bird would do it, send it to them. Colin K7FM I "started" to reply last night and I thought I'd let Colin speak for himself. He has. "I" personally didn't find him to be "condescending". You have to understand something. Bird Wattmeters or ANY equipment - as you have found "can" fail or come under question. OK - so when it does - now you're faced with the exact predicament that you are. So - do you stop working and wait and wait and wait until you can figure out what to do about THAT piece of equipment, OR do you finagle another method to check the results of the "suspect" equipment and to get a comparison reading? I can't speak for you - but I choose option number 2. I can't afford to wait. Time is money. As for "my" interest - though right now I have no doubts of my equipment, it is always nice to know what to do or where to turn to remedy any problems. I've never bothered to check into this before - regarding the bird - and your question gave me the initiative THANKS!. I believe now I can do it myself - BUT - if not - just do what needs to be done - bite the bullet and have Bird do it. I've forwarded each response to my mailbox as I always do with valid info to build my library of "Useful" information for future reference. Back to point number one....... When I got into Ham and 2 way radio - I learned how to do without the fancy equipment I couldn't afford "then". That included hooking up with those who did have it on an as needed basis. I made mock up equipment and set ups which got me pretty far along without much problem. An Eico 232 with an RF probe validated quite a few cheaper Wattmeter readings. As Colin said, you have to also make sure the Dummy Load "is" at the reference it is supposed to be OR your readings are shot in the ass. A bad dummy load can make things look pretty goofy and if you don't "check" it, then you're there scratching your head wondering what the hell is going on. Now I have all that fancy stuff and am fortunate to have it - but should it flake out - then it is back to using the other set ups until I can get this stuff back on line. As to Colin's article, I "think" I have it here somewhere - I recall reading it. Pretty good article - though with the plumbing, I chuckled due to myself not being much of a plumber! :) Those articles always give you room to think and to expand - maybe to create your own way of doing things. Just my 2 cents - taken with a grain of salt and CERTAINLY not meant either - to be condescending. L. |
Who Calibrates Bird Slugs?
At the end of the day, thank you for your input, Colin. Your help
truly is appreciated. I guess I was in a bit of a dour mood when I previously posted. Sorry if I read into your comments. 73, Jeff COLIN LAMB wrote: Well, I was trying to be helpful. Instead, I am condescending. |
Who Calibrates Bird Slugs?
Well, time flies when you are getting old. After I wrote the last note, I
remembered that the article on home made directional wattmeters was in the 80's. I vaguely recall it was October 1983. Today, I have all sorts of sophisticated test equipment, but still enjoy rolling my own and calibrating it with simple equipment. Recently some of my friends needed to measure the patterns of antennas. Although I have a couple commercial field strength meters, I constucted a simple one then used the signal generator to calibrate it. Once you have a calibrated standard, you can build frequency compensated voltage dividers to allow you to measure rf voltage with a fairly high precision. I teach survival classes and you need to learn to use what you have. I once demonstrated to a class that you could navigate with an old tennis shoe - and be as accurate as with any small handheld compass - although not nearly as quickly or as conveniently. And, I was in a map reading workshop where we were reading a number of bearings using the pocket compass. I left my compass in my pocket to see how I could do taking about 10 bearings with no compass at all. I tied for first place. By simply dividing into quadrants - by hand - you can get amazing accuracy. And, most of the people in the class got at least one wrong answer by not thinking and using the reciprocal. But, I am amazed that when I learn something new it is often from some new and inexperienced person who approached things from a different perspective than I did. 73, Colin K7FM |
Who Calibrates Bird Slugs?
Condescending?? Brother, you're one high-strung honey if you found his
advice offensive. Secondly, you aren't the only person in this conversation that requested info, and I for one appreciate these little 'brush-ups' on procedures, etc. And finally, to quote you.... "It's starting to look like I should just borrow someone else's 2,500 watt slug known to be accurate, and then just adjust the pot in mine to match! Anyone want to lend me theirs? ;-)" So looks like you're quite willing to make due and trust someone else's "accurately" misaligned slug. In conclusion.... Take a big deep breath and calm down. Your sarcasm certainly doesn't elevate you any higher than the complaints you yourself have. rib wrote in message ups.com... Thank you for telling me what ham radio is all about. 41 years of ignorance now cured. And I also deeply appreciate your pointing out my lack of effort figuring out how to use what I have. What a slackard I have been. I'll try to mend my ways. Finally, thank you so much for restating Ohm's law - I'll attempt to better understand it. Ok, let's cut to the chase here, OM ... first, if I wanted to "make do" I wouldn't have bothered to post my question, let alone invest in a Bird. Not all of us lie down and just "make do". I really don't need you to tell me how to set / lower my standards. And secondly, if I'm questioning the accuracy of a Bird slug, why on earth would I want to now rely on the accuracy of some "DVM" or "surplus voltmeter" at the kilovolt level? It simply doesn't make sense. Perhaps I am over-reacting, but your attitude is clearly condescending: all I asked was if anyone knew where I might get a slug recalibrated. I really didn't ask what you thought ham radio is all about, nor for you to judge my level of effort. COLIN LAMB wrote: "Yes, there is some good information floating around. However, it all boils down to, in your words, having an accurate standard available. I do not." This is what ham radio is all about. We make do without adequate test equipment - we just need to put a little more effort into figuring how to use what we have. Take a dummy load. Use a dvm to measure the dc resistance. That should also be the rf impedance. You can determine power going into the load by measuring the rf voltage across it. Some of the surplus voltmeters will measure rf voltage. Or, borrow one. Knowing the rf voltage across 50 ohms, you can calculate power. P= e squared / R. It is likely that the linearity of the Bird is ok, even if the power reading is incorrect. So, once you check the accuracy at one point, you have it for all points. Colin K7FM |
Who Calibrates Bird Slugs?
And Amen to real men.
Kudos, Jeff. rb wrote in message ups.com... At the end of the day, thank you for your input, Colin. Your help truly is appreciated. I guess I was in a bit of a dour mood when I previously posted. Sorry if I read into your comments. 73, Jeff COLIN LAMB wrote: Well, I was trying to be helpful. Instead, I am condescending. |
Who Calibrates Bird Slugs?
On 13 Sep 2006 13:44:56 -0700, wrote:
I have a 2,500 watt, HF slug that I don't have confidence in. Anyone know who calibrates slugs for a reasonable fee? Thanks. Jeff W8KZW http://www.radiodan.com/ deals in new and used Bird equipment. He might have some advice, or might do a tradeout with you for another slug. bob k5qwg |
Who Calibrates Bird Slugs?
Well, I went to the horse's mouth and asked Bird 1) how much, and 2)
might I drop in ... Hello Jeff, The cost for calibration on 2500w slug is base on Frequency Bands The cost 2500H is $100 the cost for 2500A; B; C; D; E AND J is $200 Regarding walk in, no we do not Calibrate walk-in basis. Best regards, Not unreasonable, I think, for commercial concerns, given the time it likely takes to do this and the investment they have made in professional-grade equipment. A bit steep for me for casual, amateur use though. .... at least they were nice. 73, Jeff |
Who Calibrates Bird Slugs?
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