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Telrad Pulser
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FYI:
I received two replies from EfstonScience () to my inquiry about the flashing pulser unit that can be configured to a telrad. One was from "Bruce" and the other was from "Mike" - both of them were familiar with the unit and said further inquiries could be directed to them. It is called a Telrad Pulser and sells for $29.95 (part # 830N004) in stock. Clear skies 'n Flashing bull's-eyes! Janice |
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Bruce McGlashan
Thanks for doing the research, Janice. I might just pick one of these up
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myself. After reading Al Seaman's comments the other day, I got to thinking, and I think he's right - a push-button on the telrad might be awkward to use. Already, I tend to haul my scope around by the diagonal. If I had to hold onto a button on the telrad, I bet I'd end up moving the scope that way too, and sooner or later that hokey tape mount would let go. Since this add-on can be turned off, it seems like the right way to fix this problem we have. Too bad I didn't know about this last week - I could have picked up one of these (or more) when I was in Toronto on the weekend. Bruce McGlashan -----Original Message-----
From: jtokar@... <jtokar@...> To: OAFs@... <OAFs@...> Date: April 25, 2001 20:48 Subject: [OAFs] Re: Telrad Pulser FYI: |
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Bruce McGlashan
Are you talking about buying the pulser unit from Perceptor or Efston? If
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the former, do you know if this is the same unit that Al Seaman described, that is available from Efston? If it is, I'd really appreciate it if you'd pick up one for me too. E-mail me offline and we'll make arrangements to get the money to you. Bruce McGlashan -----Original Message-----
From: Richard Harding <rharding@...> To: mcglashanb2@... <mcglashanb2@...> Cc: OAFs@... <OAFs@...> Date: April 25, 2001 21:58 Subject: Re: [OAFs] Re: Telrad Pulser I will be in Toronto all next week, and will pick up a Pulsar unit formyself. If anyone else wants one, I could oblige...let me know. Hey, if there were a few, I could probably negotiate a deal!! :o)
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Al Seaman
Richard Harding wrote:
Seems like there is getting to be a fair amount of interest in these things. Although I did not have time for real observing last night, took a few minutes for a star test of the Telrad through the trees in my backyard. The modification does work very nicely, and with the pulser on it is very easy to position a faint star to any point in the bullseye - even right on one of the red circles. With the pulser off, it is a normal Telrad, and the faint stars get lost any time they are close to a red circle. To anyone who gets one, the installation is easy, but be aware that with it installed you switch from using 2 AA batteries to using one 9 volt battery. This is implicit in the installation instructions, but it is easy to miss if you think it is a trivial and obvious modification. Having been in electronics too long, I did not read carefully and simply assumed that the same battery would be used. The result was that normal Telrad operation was not restored when the switch was flipped. After a lot of poking around and meter checking to find out what was wrong I finally admitted defeat. Then read the instructions more carefully - bingo! The light went on! Wired in the correct battery and everything worked as it should. It's actually easier to install it right - just don't cut off the supplied 9 volt battery connector and solder the leads to the old battery pack as I did. The moral of the story - no matter how trivial or obvious a job appears to be, be careful not to make wrong assumptions. Good luck with getting and installing the pulser units. Cheers - Al |
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Darkbeing
question how many parts ? could we possible get al the parts and put them
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together our self's to create one for our self's like from radio shack and just solder it all together I would think it could not be that hard to make the board for it all we kneed is a part list and a scymatick of the board and poof a little solder and it all be together if there selling it of 29 bucks it probly cost 5 $ in parts I do not know just a question and a idea -----Original Message-----
From: Al Seaman [mailto:alseaman@...] Sent: Thursday, April 26, 2001 10:50 AM To: OAFs@... Subject: Re: [OAFs] Re: Telrad Pulser Richard Harding wrote: Seems like there is getting to be a fair amount of interest in these things. Although I did not have time for real observing last night, took a few minutes for a star test of the Telrad through the trees in my backyard. The modification does work very nicely, and with the pulser on it is very easy to position a faint star to any point in the bullseye - even right on one of the red circles. With the pulser off, it is a normal Telrad, and the faint stars get lost any time they are close to a red circle. To anyone who gets one, the installation is easy, but be aware that with it installed you switch from using 2 AA batteries to using one 9 volt battery. This is implicit in the installation instructions, but it is easy to miss if you think it is a trivial and obvious modification. Having been in electronics too long, I did not read carefully and simply assumed that the same battery would be used. The result was that normal Telrad operation was not restored when the switch was flipped. After a lot of poking around and meter checking to find out what was wrong I finally admitted defeat. Then read the instructions more carefully - bingo! The light went on! Wired in the correct battery and everything worked as it should. It's actually easier to install it right - just don't cut off the supplied 9 volt battery connector and solder the leads to the old battery pack as I did. The moral of the story - no matter how trivial or obvious a job appears to be, be careful not to make wrong assumptions. Good luck with getting and installing the pulser units. Cheers - Al Your use of Yahoo! Groups is subject to |
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Al Seaman
Darkbeing wrote:
How many parts - Well it has a small printed circuit about 1 inch square, on which there is an 8 pin IC (haven't checked the part number against catalogs to see what it is), a capacitor, a variable resistor, a double pole - centre off toggle switch, two wires ending in a 9 volt battery connector, and two wires with bare ends. It is a very simple thing obviously, and you could no doubt buy the parts for less than $29 (but it will likely be more than $5 for parts). Also, there is no schematic. From my point of view, it is worth the price to have it already assembled and ready to install. And that installation (if you do it right the first time) should take less than 30 minutes. In brief - cut off the old battery holder. Drill one hole in the side of the Telrad for the switch, mount the switch in the hole (that supports the whole unit), connect the two bare wires to the former battery wires using the twist on connectors supplied, add a 9 volt battery, and voila. Hope that answers the question. Cheers - Al |
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Darkbeing
thank you
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-----Original Message-----
From: Al Seaman [mailto:alseaman@...] Sent: Saturday, April 28, 2001 1:59 PM To: OAFs@... Subject: Re: [OAFs] Re: Telrad Pulser Darkbeing wrote: could not be that hard to make the board for it all we kneed is a part list anda scymatick of the board and poof a little solder and it all be together ifjust a question and a ideaHow many parts - Well it has a small printed circuit about 1 inch square, on which there is an 8 pin IC (haven't checked the part number against catalogs to see what it is), a capacitor, a variable resistor, a double pole - centre off toggle switch, two wires ending in a 9 volt battery connector, and two wires with bare ends. It is a very simple thing obviously, and you could no doubt buy the parts for less than $29 (but it will likely be more than $5 for parts). Also, there is no schematic. From my point of view, it is worth the price to have it already assembled and ready to install. And that installation (if you do it right the first time) should take less than 30 minutes. In brief - cut off the old battery holder. Drill one hole in the side of the Telrad for the switch, mount the switch in the hole (that supports the whole unit), connect the two bare wires to the former battery wires using the twist on connectors supplied, add a 9 volt battery, and voila. Hope that answers the question. Cheers - Al Your use of Yahoo! Groups is subject to |
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