H
hossless
Guest
Hey there, I need to know what all needs to be done to get more than the 23 channels on a Tram Titan ll, and how many more channels can be added.
Thanks, Hossless
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Thanks, Hossless
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Wow, talk about rowing upstream without a paddle....
The Titan II is a lot of work to expand either the receiver or the transmitter's coverage.
For one thing, adding more tuneable receiver bands requires that you unhook the hot side of the 31.5 MHz crystal in receiver, obtain either or both 31.2 MHz for lowers, 31.8 for uppers above channel 26, and add a selector for the old and new band crystals. The last couple of them we had here, the customer said "Screw USB and LSB, it's actually DSB on transmit." This made it possible to use the USB/LSB/AM/M switch to instead select the band crystal. Since it would also no longer have a 'fixed' crystal receive option, we connected the receiver VFO circuit to run full-time, rather than up into and back out of he original selector. And that only converts the receiver. The transmitter frequency is controlled independently. Those 23 crystals in their sockets have no receiver function, they control only the transmit frequency.
Simplest transmitter expansion is to have crystals custom-made for whatever 'extra' channels you want. Gets pretty expensive for more than a handful of new transmit channels.
Putting a slider onto the thing is no easy task. The transmit crystal runs the driver tube that feeds the two 6GK6 finals. Actually, only one of the two final tubes runs on AM. Those crystals have a lot of drive on them, so getting a slider to do the same thing ain't easy. Besides, you have to 'unkey' the slider if you want to receive. Otherwise, you will have a contiuous 'spot' carrier covering up the receiver, since the transmit crystal is running ON your receiver frequency, so must the slider. You could run a separate "key/spot" wire out to the slider, to cut it off during receive, if you feel like modifying the slider to do that.
We have tried adapting a converter board that we use for the old AM-only Browning transmitters, but the results are not completely satisfactory, yet. The transmitter that it was built for requires less than half the drive that the Titan II needs. Maybe we'll get that one worked out, maybe not. Even if you can locate one of the old Glenn "326-1" adapters that he sold to go with the Glenn slider, it has only about one-fourth the drive coming out of it that the Titan II requires. That little board was also made with the old Browning transmitters in mind, not this radio.
The way those 'converter' boards work is to combine the slider frequency with a crystal on the adapter. Glenn used a 10 MHz crystal. You set the Glenn to read "10.000" on standby, and it would display your channel frequency when you flipped the switch to 'operate'. Since the Glenn was feeding a 17 MHz carrier into the transmitter, it would not cover up your receiver listening to 27 MHz. The adapter hooked to the Spot circuit in the transmitter, so that the crystal would run only when you keyed, or pushed the Spot button. Problem is, it was built for transmitters that had a positive voltage to 'tap into' that is switched off during receive. The Titan II is not wired that way. One of the things we had to adapt on our toy, was to key our crystal from the "ground-side" transmitter keying circuit found in the Titan II. Our board had been originally designed to activate from a "hot-side" circuit in a Browning transmitter. The Titan II is different in that department, too.
Like I said, lotsa work. Sure would be nice if somebody (else) came up with a converter board that would let you run BOTH the receiver and transmitter from the same slider. Wouldn't be simple. Wouldn't be cheap. Probably wouldn't sell too many of them.
73
</p>
The Titan II is a lot of work to expand either the receiver or the transmitter's coverage.
For one thing, adding more tuneable receiver bands requires that you unhook the hot side of the 31.5 MHz crystal in receiver, obtain either or both 31.2 MHz for lowers, 31.8 for uppers above channel 26, and add a selector for the old and new band crystals. The last couple of them we had here, the customer said "Screw USB and LSB, it's actually DSB on transmit." This made it possible to use the USB/LSB/AM/M switch to instead select the band crystal. Since it would also no longer have a 'fixed' crystal receive option, we connected the receiver VFO circuit to run full-time, rather than up into and back out of he original selector. And that only converts the receiver. The transmitter frequency is controlled independently. Those 23 crystals in their sockets have no receiver function, they control only the transmit frequency.
Simplest transmitter expansion is to have crystals custom-made for whatever 'extra' channels you want. Gets pretty expensive for more than a handful of new transmit channels.
Putting a slider onto the thing is no easy task. The transmit crystal runs the driver tube that feeds the two 6GK6 finals. Actually, only one of the two final tubes runs on AM. Those crystals have a lot of drive on them, so getting a slider to do the same thing ain't easy. Besides, you have to 'unkey' the slider if you want to receive. Otherwise, you will have a contiuous 'spot' carrier covering up the receiver, since the transmit crystal is running ON your receiver frequency, so must the slider. You could run a separate "key/spot" wire out to the slider, to cut it off during receive, if you feel like modifying the slider to do that.
We have tried adapting a converter board that we use for the old AM-only Browning transmitters, but the results are not completely satisfactory, yet. The transmitter that it was built for requires less than half the drive that the Titan II needs. Maybe we'll get that one worked out, maybe not. Even if you can locate one of the old Glenn "326-1" adapters that he sold to go with the Glenn slider, it has only about one-fourth the drive coming out of it that the Titan II requires. That little board was also made with the old Browning transmitters in mind, not this radio.
The way those 'converter' boards work is to combine the slider frequency with a crystal on the adapter. Glenn used a 10 MHz crystal. You set the Glenn to read "10.000" on standby, and it would display your channel frequency when you flipped the switch to 'operate'. Since the Glenn was feeding a 17 MHz carrier into the transmitter, it would not cover up your receiver listening to 27 MHz. The adapter hooked to the Spot circuit in the transmitter, so that the crystal would run only when you keyed, or pushed the Spot button. Problem is, it was built for transmitters that had a positive voltage to 'tap into' that is switched off during receive. The Titan II is not wired that way. One of the things we had to adapt on our toy, was to key our crystal from the "ground-side" transmitter keying circuit found in the Titan II. Our board had been originally designed to activate from a "hot-side" circuit in a Browning transmitter. The Titan II is different in that department, too.
Like I said, lotsa work. Sure would be nice if somebody (else) came up with a converter board that would let you run BOTH the receiver and transmitter from the same slider. Wouldn't be simple. Wouldn't be cheap. Probably wouldn't sell too many of them.
73
H