CM4221HD has a set of FOUR WINGNUTS on the short struts that interconnect Bowtie Assembly and the Reflector Rod Assembly, see fol. User Guide....so it's easy-peasy to disassemble the Antenna....you just have to FIGURE OUT how to SUPPORT the Bowtie Assembly at least a few inches AWAY from any other Metal (i.e. the Antenna Mast):
HOWEVER, THAT IS NOT WHAT I WOULD RECOMMEND:
It would help if you could tell us WHICH Channels are LOST when you connect BOTH Antennas using RF Combiner, so we might be able to determine SUSPECT CAUSES.
For Example, in your TVFool Report, ADJACENT CHANNEL Desensitization "Issues" are marked with a small Red "a" to the far Left, as indicated for Ch35 [due to Very Strong Ch36, but you don't NEED Ch35] and Ch34 [due to stronger Ch35, carries YOU-TOO-AMERICA, if that is of any interest to you]. FYI: Ch35 [CTV-2] carries SAME PROGRAMS as much stronger Ch42, so presumably you don't NEED it:
[See CHCJ on Ch35]
ALSO, Ch32 is your STRONGEST Signal, which means it COULD be affecting Weak Ch35 [just mentioned], 29 [WDTB, DAYSTAR, Duplicate on Stronger Ch9, so you may not NEED Ch29 anyway] and/or 34 [just mentioned]....due to NEAR-ADJACENT [aka "TABOO"] Desensitization, which is only a bit less of a problem as Adjacent Channel Desensitization. If you WANT Ch29 and you have reception issues, a SINGLE CHANNEL FILTER for Ch32 might improve your situation, such as from Jan Jenca or (more expensive) Tin-Lee:
You MAY WANT Hi-VHF coverage in TWO different Directions [fortunately SAME as two UHF Directions]:
CFTO on Hi-VHF Ch9 [towards NORTH] carries CTV-1 Programs [presumably different than CTV-2 on CKVP Ch42].
WBBZ on Hi-VHF Ch7 [towards SOUTH-EAST] carries ME, HEROS&ICONS and DAYSTAR Networks - which you probably WANT:
FYI: Programs on all BUFFALO Stations: https://www.rabbitears.info/market.p...arket&mktid=63
PS: All Co-Channel "Issues" marked by a small RED "c" to the far Left, are limited to TVFool's RED ZONE stations, which I presume are either of No-Interest....or TOO WEAK to be received.
Since Hi-VHF/UHF Combo Antennas are needed if you WANT CTV-1 on Ch9 (Toronto to NORTH) and Ch7 (Sprinville, NY to SOUTH-EAST), I would recommend a pair of RCA 8-Element ANT-751's (or newer 7-Element ANT-7511's), which are small (under 1-m), inexpensive Hi-VHF/UHF COMBO Yagis. The Front/Back Ratios will help to SUPPRESS Interference from ONE Antenna getting into the OTHER Antenna....something a pair of Antennas with RF Combiner...or even a Reflectorless CM4221HD....just can't do.
NOTE: If you don't WANT Ch7 and/or Ch9 NOW, SOMETIME before the 2019-2020 DEADLINES for each DMA (we don't yet know how much EARLIER that might be...probably concurrent with ATSC 3.0 turn-on) the current channelization scheme will CHANGE with Ch34 moving to Ch11, Ch26 moving to Ch5 and Ch9 to Ch8:
BUT WAIT....THERE'S MORE: Those are just the CHANNELS....Some Networks are expected to SHARE Channels in order to make room for ATSC 3.0 Channels....so it is VERY LIKELY that SOME Networks will JUMP to one of the Hi-VHF Channels [or even Lo-VHF, esp. Repeaters and/or (low-power) LPTV]....and we do NOT know yet WHICH of the Minor and/or Major Networks will move...nor where.... SO it wouldn't hurt to have COMBO Hi-VHF/UHF Antennas in BOTH Directions NOW so you wouldn't have to change SOMETIME prior to 2020 DEADLINE to free up Ch38-51 for Cell Phones.
[We're ALREADY seeing Networks JUMP to another Channel in preparation for the coming upheaval....in a couple months here in San Diego "THE CW" will move from a Tower in Tijuana [FOX up until a few years ago] to SHARE Ch8 with CBS, located 1/2 way to Orange County Border, although still near the Beach]
If Antennas were mounted OUTDOORS, you likely would NOT need a Preamp...even with up to 4 Drops, but INDOORS you should try to improve the Sensitivity as much as possible ["typically" about 10 dB], so I'm going to recommend using a Preamp. This can be a combination VHF/UHF Preamp with a VHF/UHF Combiner....or, my preference, the inexpensive PCT (Channel Master) CM3410 Distribution Amplifier [specs claim it is water resistant], which has been tested to have about SAME Overload resistance as the A-D Juice Mast Mounted Preamp.....and the small amount of Loss between Antennas and DistroAmp (incl. about 1 dB in VHF/UHF Combiner) can actually HELP the Overload/Desensitization since Intermod Noise is reduced 3 dB for every 1 dB of LOSS on DistroAmp's Input:
[BTW: Although it can be configured with SEPARATE VHF and UHF Inputs, I would AVOID RCA TVPRAMP1 in your situation, since it has significantly WORSE Tolerance to Overload/Desensitization.]
SINGLE CHANNEL ATTENUATION AND FM FULL BAND REJECT FILTERS:
As mentioned above, a SINGLE CHANNEL FILTER on your Strongest Ch32 MIGHT be needed to prevent Preamp Overload [which is actually Desensitization for Weaker Stations]. Your Attic Loss ["typically" 13+ dB +/- 7 dB] will "probably" protect you against a similar situation with your second Strongest Ch36, so you "probably" don't need a similar Filter for Ch36.....hopefully.
HOWEVER, I also entered your (approx) location to generate the fol. FMFool Report. You have MULTIPLE EXTREMELY and VERY Strong FM Signals. The RCA PRAMP1 has a built-in FM Filter that is fairly good....HOWEVER, due to the extreme signals, I am going to recommend that you ALSO insert a FULL BAND FM FILTER on the input of whichever PREAMP you chose, such as:
BTW: These are actually strong enough to possibly ALSO affect UHF Channels....and the Tuner with or w/o Preamp.
PS: Since we do not know your ACCURATE Location, I used the nearby [3.9-mi] POST CODE of CKVP's Tower.....I would recommend you enter your Location into www.fmfool.com
and then click on "FM Channels (save image)" so you can do a simple Copy/Paste of the URL (WebAddress) into this Thread.