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705 [2007/02/13 23:23] n5na |
705 [2012/01/25 22:49] (current) n1eu |
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| ====== Microphone Model 705 ====== | ====== Microphone Model 705 ====== | ||
| + | {{705.jpg?150|}}{{705btm.jpg?150|}} | ||
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| ===== Description ===== | ===== Description ===== | ||
| The Ten-Tec Model 705 is an Electret desk microphone designed for use as a station microphone in commercial and amateur radio communications and in public address and paging installations. The microphone consists of a base section and flexible gooseneck mounted microphone. The Model 705 incorporates a momentary type Push-To-Talk (PTT) button (gray), a Push-On, Push-Off locking type button (black), electronic circuitry to switch the microphone on, a signal amplifier that adds 13 dB of gain to the output level, an attached output cable and a battery compartment for a 9 volt alkaline battery. The PTT circuitry allows switching transmitters and/or transceivers, that have a low voltage positive T/R lines, into transmit mode. A light emitting diode in the base signals the transmit mode. | The Ten-Tec Model 705 is an Electret desk microphone designed for use as a station microphone in commercial and amateur radio communications and in public address and paging installations. The microphone consists of a base section and flexible gooseneck mounted microphone. The Model 705 incorporates a momentary type Push-To-Talk (PTT) button (gray), a Push-On, Push-Off locking type button (black), electronic circuitry to switch the microphone on, a signal amplifier that adds 13 dB of gain to the output level, an attached output cable and a battery compartment for a 9 volt alkaline battery. The PTT circuitry allows switching transmitters and/or transceivers, that have a low voltage positive T/R lines, into transmit mode. A light emitting diode in the base signals the transmit mode. | ||
| - | The Model 705 comes in two versions. The standard unit includes a four pin standard locking type cable connector which is pin compatible with Ten-Tec Models 560, 561, and 585. With a minor resistor change in the Models 560 and 561, the standard unit may be powered from the transceiver without the need for a 9 volt battery. The Model 705-A comes with a stereo 1/4" phone plug. This unit is compatible with the Ten-Tec Models 525, 540, 544, 515, and other early models. A 9 volt battery is required for the Model 705-A. | + | The Model 705 comes in two versions. The standard unit includes a four pin standard locking type cable connector which is pin compatible with Ten-Tec Models [[560]], [[561]], [[562]], [[563]], [[564]] and [[585]]. With a minor resistor change in the Models [[560]] and [[561]], the standard unit may be powered from the transceiver without the need for a 9 volt battery. The Model 705-A comes with a stereo 1/4" phone plug. This unit is compatible with the Ten-Tec Models [[525]], [[540]], [[544]], [[515]], and other early models. A 9 volt battery is required for the Model 705-A. |
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| + | ===== Difference Between the 705 and 706 ===== | ||
| + | The 705 and [[706]] are essentially the same. The 706 does not have the compartment in the bottom to hold a 9V battery to supply voltage for the electret mic and circuitry. The [[706]] only works with rigs that supply the necessary voltage through the mic connector whereas the 705 can operate from rig voltage or battery. Also the 705 has a switch on the bottom to tell the controls on the mike base if you operate VOX or PTT. The 705 has a bit more versatility for use with older transceivers not having voltage present at the mic connector for the electret mic. | ||
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| + | ===== Corsair Modification ===== | ||
| + | The documentation that accompanied the 705 microphone included information on modifying a Corsair I or early Corsair II (s/n before 1970) to power the 705 microphone. The modification involves shunting an existing 10K ohm resistor on the IF/AF board with a 470 ohm 1/2w resistor. | ||
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| + | ===== Mods & Tips ===== | ||
| + | *[[705gain|705 Gain Mod]] | ||
| + | *[[705lowout|705 Low Output]] | ||
| + | *[[705conn|Connector Wiring]] | ||
| + | *[[706-588wiring|Wiring Diagram]] for an 8 pin connector | ||
| ===== Specifications ===== | ===== Specifications ===== | ||
