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primodescription
Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
| Beide Seiten der vorigen Revision Vorhergehende Überarbeitung Nächste Überarbeitung | Vorhergehende Überarbeitung Nächste Überarbeitung Beide Seiten der Revision | ||
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primodescription [2019/02/21 13:52] df2et |
primodescription [2019/03/19 11:30] oe7bsh [Primo] autOmatically typo |
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| {{::primo:primo.jpg?direct&400 |}} | {{::primo:primo.jpg?direct&400 |}} | ||
| - | These pagers were available in the former POCSAG net by Deutsche Telekom AG and later by e*message. The HF part of the receiver is identical to [[skyperdescription|Skypers]]. The modification for 439.9875 MHz is thus the same. The shortcome is that the display is much smaller and there is no built-in function for setting time and date autmatically. In addition the date only allows years up to (20)13 starting from (19)94 to be set. This has to be done by hand and is lost on longer absence of battery power. | + | These pagers were available in the former POCSAG net by Deutsche Telekom AG and later by e*message. The HF part of the receiver is identical to [[skyperdescription|Skypers]]. The modification for 439.9875 MHz is thus the same. The shortcome is that the display is much smaller and there is no built-in function for setting time and date automatically. In addition the date only allows years up to (20)13 starting from (19)94 to be set. This has to be done by hand and is lost on longer absence of battery power. |
| ===== Modification for UHF ham band use ===== | ===== Modification for UHF ham band use ===== | ||
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| ==== Exchanging the crystal ==== | ==== Exchanging the crystal ==== | ||
| - | Next is to exchange the crystal to get the LO to the correct frequency. You will need a crystal with 69.764583MHz to get the Skyper working on the (German) centralized DAPNET frequency of 439.9875 MHz. To remove the old crystal you can remove solder with a desoldering pump. | + | Next is to exchange the crystal to get the LO to the correct frequency. You will need a crystal with 69.764583MHz to get the Primo working on the (German) centralized DAPNET frequency of 439.9875 MHz. To remove the old crystal you can remove solder with a desoldering pump. |
| {{ :primo:primo_removed_crystal.jpg?direct&600 | Removed crystal}} | {{ :primo:primo_removed_crystal.jpg?direct&600 | Removed crystal}} | ||
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| When this is finished you can improve reception by tuning the antenna circuit to maximum signal strength. Therefore conncect your scope to pin 12 and tune to maximum signal by turning trimmer CT1 carefully. | When this is finished you can improve reception by tuning the antenna circuit to maximum signal strength. Therefore conncect your scope to pin 12 and tune to maximum signal by turning trimmer CT1 carefully. | ||
| - | If all is done your Promo should receive messages from DAPNET network. You can test that using the "Send Message" function of UniPager which circumvents the DAPNET connection and sends out POCSAG calls directly. | + | If all is done your Primo should receive messages from DAPNET network. You can test that using the "Send Message" function of UniPager which circumvents the DAPNET connection and sends out POCSAG calls directly. |
| ===== RIC programming ===== | ===== RIC programming ===== | ||
primodescription.txt · Zuletzt geändert: 2022/01/11 18:09 von do1goe
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